The Engineering Index

AIR BRAKE

planation of the results accomplished by this device, and an outline of the benefits when properly installed and maintained. 3800 w. RR Gaz -Jan. 29, 1904.

The High and Low Pressure Retaining Valve. Illustrated description of a device for increasing the certainty of controlling heavily loaded trains. 1200 w. RR Gaz-Vol. XXXVIII., No. 12. Westinghouse.-See also WESTINGHOUSE. AIR COMPRESSOR.

See also COMPRESSED AIR; COMPRESSED-AIR PLANT.

Types of Foreign Air Compressors, J. Walter Pearse. Illustrates and describes types from a number of foreign plants. 4000 w. Compressed Air-June, 1902.

Accident. See Cylinder Temperature; Explosion. Altitude.-See COMPRSSED AIR.

Bendigo.-Air Compressing Machinery. Johan Sarvaas. Read before the Australian Inst. of Min. Engrs. An account of its use in the Bendigo gold fields, and its many advantages as a power for underground work. Also notes defects of air compressors. 2800 W. Aust Min Stand-April Brief illustrated

10. 1902.

Bland. A Novel Air Compressor.

description of the invention of Henry Bland, of Sydney, Australia. 800 W. Sci Am-June 16,

Butte, Mont.-Air Compressing Plant of the Never Sweat Mine of the Anaconda Copper Mining Co. at Butte, Montana. An ilustrated detailed scription of Ingersoll-Sergeant Corliss compressors. 1200 w. Compressed Air-July, 1901. Classification.-Classification of Air Compressors. Robert Peele. Gives classification by characteristics purely as engines, by mode of dealing with heat produced, by types of valves and valve motions. 2500 W. Mines & Min-May, 1905. Collmann.-The New Collmann Air Compressor at the Harpen Mines at Dortmund (Die Neuen Collmann Luft Kompressoren der Zechen "Caroline" und "Vollmond" der Harpener Bergbau Aktien Gesellschaft zu Dortmund). F. Schulte. With a full data of dimensions and performance, and reproductions of indicator diagrams. 1500 W. 1 plate. Glückauf-Nov. 9, 1901.

New Collman Air Compressors at German Collleries. F. Schulte in Glückauf. Illustrated description. 1200 w. Col Guard-Dec. 20, 1901. Air Compressor for the Harpener Mining ComAn illustrated description of a compound air compressor, with Collman valves, made by Schüchtermann and Kremer, of Dortmund, and exhibited at Düsseldorf. 1 plate. 700 w. Engng-Dec. 12, 1902.

pany.

Compound.-Double Compound Compressor (ZwilIllustrated descriplings-Verbund Kompressor). tion and account of tests of air compressor at the Emscher pit of the Cologne Mining Company. Indicator diagrams from steam and air cylinders are given. 1200 W. Glückauf-May 2 plates. 25, 1901.

A New Type of Air Compressor. W. H. Booth. Illustrates and describes a compact, duplex, twostage compressor, direct-driven by an electric motor, adapted to use in mines or shops. Made by an English company. 2200 W. Mines & MinNov., 1903.

Compound Compressor at the St. Pancras Mine at Närschan (Verbund-Stufen-Kompressor der St. Pankrazzeche in Nürschan). Julius Divis. With diagrams from the steam and air cylinders, showing the action of the Riedler valve gear. 2000 w. 1 plate. Oesterr Zeitschr f Berg u Hüttenwesen -Feb. 13, 1904.

AIR COMPRESSOR

and

The

Temperatures in Air and Ammonia Compressor Cylinders. Leicester Allen. A discussion of the of indeterminate character present information about compression temperatures. 3000 W. Engineering Magazine-August, 1905. D'Auria.-The D'Auria Air-Compressor. Henry G. Morris. Illustrates and describes a new form of air-compressor, and stating its advantages. 1400 W. Trans Am Inst of Min Engs-April, 1901. Daw. The Daw Air-Compressor. Illustrates describes these machines and their operation. object of the invention is the economical production at speeds hitherto thought unattainable, securing greater output from smaller machines. 2400 w. Engng-Sept. 26, 1902. Design.-The Air Compressor. R. H. Collingham. On the design of air compressors, indicating how theoretical facts and formulae may be made of use in the every-day practice of the drawing office and testing plate. Serial. 1st part. 1800 W. Engr, Lond-June 3, 1904. Düsseldorf Exposition.-Air Compressors at the Düsseldorf Exposition (Der Bergbau auf der Düsseldorfer Ausstellung 1902. Die Luftkompressoren). Hr. Müller. An illustrated description of various kinds of air compressors, particularly of those used for mining purposes. 8 plates. 3500 W. Glückauf-June 21, 1902.

See also Compound.

Electric.-Compressed Air for Mining from Electric Power. John B. Tregloan. A record of results obtained with a 10 x 18-inch duplex, single-stage belt driven compressor. Ill. 1900 w. Min & Sci Pr-April 26, 1902.

Electrically Driven Air Compressors (Elektrisch Betriebene Luftkompressoren). Α fully illustrated account of the application of electric driving to various forms of air compressors, with especial reference to their use in mining work. Two articles. 4000 w. Glückauf-Oct. 1 plate.

3, 10, 1903.

Electrically-Driven Underground Air-Compressors (Les Compresseurs d'Air à Commande Electrique pour les Installations Souterraines). H. Denis. Showing how the advantages of elctric transmission and pneumatic appliances may be combined Serial. in mining operations. Part I. 2000 w. Revue Technique-Aug. 25, 1904.

Electrical Compression of Air for Mining Purposes. Lucius I. Wightman. An illustrated article describing the electrical air compressor, and considering driving by belts, ropes, gears. silent chains, and direct connections, sizes of units, &c. 7400 w. Mines & Min-May, 1905.

A High Speed Electrically Driven Compressor for Colliery Work. W. Reavell. Read before the S. Wales Inst. of Engrs. Illustrated description

of a machine which can be directly driven by an electric motor and can be made in small units when desired. 3800 words. Ir & Coal Trds RevJuly 14, 1905.

A High-Speed Electricaly Driven Compressor for Colliery Work. W. Reavell. Abstract of paper before the South Wales Institute of Engineers, giving an illustrated description of an air compressor with four cylinders disposed radially in a cir3000 W. cular casing. Elect'n, Lond-Sept. 1, 1905.

See also Two-Stage, Duplex. Electric vs. Steam.-Comparison of Costs of Compressing Air with Steam and Electricity at Rossland, British Columbia. William Thompson. Describes the steam and electric plants compared and records their performance. 2500 W. Min Rept-July 14, 1904.

Comparison of Costs of Compressing Air with Steam and Electricity at Rossland, B. C. William Thompson. Read before the Canadian Mining Inst. Describes the steam plant erected for the Le Roi Mining Co., and the electric plant erected by the Rossland Great Western Mines, Limited, comparing their economy and relative efficiency. 2200 w. Can Min Rev-Aug. 30, 1902. Explosion.-Notes on Accidents Due to Combustion within Air Compressors. Albert R. Ledoux. Describes a casualty due to lack of judgment and care in the use of air compressors. 1000 w. Trans Am Inst of Min Engrs-Feb., 1903.

Accidents Due to Combustion Within Air-Compressors. E. Hill. Discussion of the paper of Dr. Albert R. Ledoux. A mathematical discussion of the heat of compression in air-cylinders. 1200 w. Trans Am Inst of Min Engrs-Feb., 1903.

AIR COMPRESSOR

Accidents Due to Combustion Within Air Compressors. Editorial discussion of points to be considered to avoid accidents. Called out by Dr. Ledoux's paper before the Am. Inst. of Min. Engrs. 600 w. Compressed Air-June, 1903.

Explosions in Air Compressors. E. Goffe. Read before the Mech. Engrs'. Assn. of the Witwatersrand. Describes conditions under which explosions occurred in South Africa, discussing the causes. 2400 W. Mech Engr-April 16, 1904.

Causes of Explosions in Air Compressors. Abstract of a paper by E. Goffe, and discussion, before the Mech Engr's. Assn. of the Witwatersrand, dealing with this subject. 1800 W. Engr, Lond -Nov. 11, 1904.

Ignitions and Explosions in the Discharge Pipes and Receivers of Air Compressors. Alex. M. Gow. A report of extensive investigation undertaken to ascertain what precautions should be taken to guard against such acidents. A valuable paper. 5700 W. Eng News-March 2, 1905.

See also Cylinder Temperatures; COMPRESSED AIR.

Field Riveting.-An Air Compressor Plant for Field Riveting. Illustrated description of a 2-stage compressor on top of a horizontal receiver, the whole carried on the same skids, that support the boiler. 500 w. Eng Rec-Dec. 1, 1900. Four Stage.-Four-Stage Air Compressor for 850lbs. Pressure. Illustrated description of an interesting machine recently installed at the Aragon mine at Norway, Mich., for the purpose of supplying compressed air for locomotives for the haulage system. 1700 w. Eng News-Nov. 26, 1903. Franklin, Pa., Works.-A Modern Manufacturing Plant. Illustrated description of the new establishment of the Franklin Air Compressor Company, at Franklin, Pa. 1500 W. Ry Age-Feb. 22, 1901.

Gas Engine Starting.-High-Pressure Compound Air Compressors (Hochdruck Verbundkompressoren). Describing special forms of compressors for furnishing a supply of compressed air for starting large gas engines. 800 W. Stahl u Eisen-March

15, 1905.

IllusHum

German.-Some German Air-Compressors. trations and particulars relating to the boldt compressor, and also the Dingler compressor. 1800 w. Quarry-June 1, 1901.

Governor. See GOVERNOR-Nordberg. High Speed.-High Speed Air Compressors (Ueber Kompressoren mit Erhöhten Umdrehzahlen). F. Harth. An examination of the action of air compressors operate at high rotative speeds, with especial reference to valve action and inertia forces. 3500 w. 1 plate. Glückauf-Feb. 14, 1903.

High-Speed Air Compressors (Ueber Kompressoren mith Erhöhten Umdrehzahlen). F. Harth. A discussion of the changes in steam-driven air compressors to give them higher speed, and of their efficiency. Diagrams. 1 Plate. 3500 W. Glückauf-Feb. 14, 1903.

Experiments with High-Speed Compressors (Versuche mit Raschlaufenden Kompressoren). A. Lebrecht. Data and results of tests upon balanced compressors adapted for direct connection to electric motors, and operating at rotative speeds of 800 to 1.200 revolutions per minute. Serial. Part I. 3000 W. Zeitschr à Ver Deutscher Ing-Feb. 4, 1905.

The High-Speed Compressor. Joseph D. Cone. Explains its advantages for certain work, giving examples of compressors direct driven by electric motors, gas engines, and steam. Ills. 2400 w. Mines & Min-May, 1905.

Hoerbiger Valves.-A Compound Air Compressor with Hoerbiger Valves (Verbundkompressor mit Lenkerventilen, Bauart Hoerbiger). L. Walther. An illustrated description of an air compressor fitted with linked plate valves on the Hoerbiger system, built by the Dingler Machine Works in Zweibrücken. Indicator diagrams. 1 plate. 1500

Zeitschr d Ver Deutscher Ing-April 4, 1903. Hydraulic.-The Hydraulic Compression of Air, William O. Webber. Briefly reviews the various devices used, especially describing the compressors on the Taylor principle. 1400 w. PowerOct., 1901.

Wil

Water Power by Direct Air Compression. liam O. Webber. Reviews some of the uses of compressed air and the old methods of mechanical compression, and also the methods of compressing air directly by failing water or under pres

sure. III. 3500 w. Jan., 1901.

AIR COMPRESSOR

Jour Assn of Engng Socs

See also Water-Wheel Driven; AIR LIFT. Hydraulic, Magog.-Test of an Hydraulic Air Compressor. William O. Webber. A record of results obtained in some tests at the plant of the Dominion Cotton Mills Company, Limited, at Magog, P. Q., Canada. Ill. 1300 w. Trans Am. Soc of Mech Engrs., No. 889-May, 1901. Hydraulic, Norwich, Conn.-The Norwich Hydraulic Compressed Air Plant. Illustrated detailed description of an interesting plant to furnish compressed air through 3 miles of 16-inch plain castiron pipe to power users in Norwich. 2000 w. Eng Rec-Aug 24, 1901.

The Hydraulic Air Compressor at Norwich, Conn. Herbert M. Knight. An illustrated description of this installation for the compression of air by what is known as the "Taylor System." 2800 W. Eng News-June 12, 1902.

Inlet Washer.-Air Washer for Compressor Inlets. An illustrated description of a device for remov. ing the dust and cleaning the air. 400 w. Compressed Air-Nov., 1902.

King-Riedler.-A King-Riedler Air Compressor of 1,000 Horse-Power. Illustrated detailed description. 1200 W. Am Mach-Oct. 16, 1902.

Details of Vertical Air-Compressor (King-Riedler Type). An illustrated description. 1500 w. Plate. Engng-Nov 14, 1902.

Köster.-Tests of the Köster Air Compressor (Mittellungen über Versuche an einem Luft Kompressor mit Köstersteuerung). H. Terbeck. Tests of a compressor with mechanically operated valves, with indicator diagrams showing the valve action and efficiency. 5000 w. Glückauf-Jan. 1 plate. 2, 1904. Morning Mine, Idaho.-See Water-Wheel Driven. Multiple Stage.-Multiple Stage Air Compression. John H. Barr. Read before the Cornell Soc. of Mech. Engs. Illustrates and describes single stage and three stage compression, and gives a 3000 comparison of the probable performances. W. Sib Jour of Engng-Jan., 1901. See also Riedler.

Nordberg.-Efficiency Test of a Nordberg Air Compressor at the Burra Burra Mine of the Tennessee Copper Company. J. Parker DeChanning. scribes the conditions and the methods of testing, reporting results. 1500 w. Mines & MinMay, 1905. Operating. Suggestions for Running Air Compressors. M. W. Sherwood. Suggestions for setting and leveling, measuring and adjusting clearance, lubrication, etc. 12000 w. Mines & Min-July, 1905.

Packing.-See PACKING-Compressor Piston. Performance.-Air Compressors (Luftkompressoren). E. W. Köster. A review of the performance of various arrangements of steam and air cylinders with diagrams showing the distribution of work, and the flow in the passages. 5000 w. Zeitschr d Ver Deutscher Ing-Jan. 23, 1904. Phoenix, British Columbia.-The New Compressors of the Granby Company at Phoenix. George E. Cole. An illustrated detailed description of a recent installation in British Columbia. 1500 w. BC Min Rec-Aug., 1903.

Portable.-Three-Stage Air Compressor (Dreistufiger Luftkompressor). Julius Divis. Describing a convenient portable air compressor for mining use. 1800 W. 1 plate. Oesterr Zeitschr f Berg u Hüttenwesen-Dec. 3, 1904. Pribram.-The New Air Compressors at Pribram (Die Neueren Luftcompressoren in Pribram). Divis. An examination of the advantages of compressed air in mining, with a review of recent

AIR COMPRESSOR

practice in Bohemia. Serial. Part I.

1800 w. 1 plate. Oesterr Zeitschr f Berg u HüttenwesenJuly 6, 1901.

Power.-See COMPRESSED AIR-Work.
Pump Operation.-See COMPRESSED AIR.

Ratio. Safe Ratios in Air Compression. Fred v. D.
Longacre. On the determination of the maximum
ratio of compression that can be used in a single
cylinder with safety. Also editorial. Ill. 3500
W. Compresed Air-Feb., 1903.
Reavell.-Quadruplex Two-Stage Air Compressors.
Illustrated detailed description of the Reavell air
compressor. 2000 W. Engr. Lond-Aug. 22, 1902.
Receiver.-See COMPRESSED AIR.
Reheater.-See COMPRESSED AIR.

Riedler. A New Riedler Air Compressor.

Illus

trated description of a vertical engine with compound air and steam cylinders, and an unusual connection between the piston rods and fly-wheel shafts; the machine is rated at 6,860 cu. ft. of free air per minute at 80 lbs. pressure. 400 W. Eng Rec-Jan. 26, 1901.

Compound Multiple-Stage Air Compressor (Verbund-Stufenkrompressor). Julius Divis. Describing an improved Riedler compressor of 70 cubic metres per minute capacity, recently erected at Nurshan, Bohemia. 1500 W. 1 plate. Glück

auf-Jan. 23, 1904.

Study of a Riedler Air Compressor. Arthur P. Hall. Explains the general working of the machine, and gives a series of cards taken under various conditions. 600 W. Compressed AirJuly, 1905.

Tests of a Riedler Two-Stage Air Compressor. William D. Hamilton. A report of trials made to demonstrate the capacity and efficiency of a "Riedler" compressor. Ills. Serial. 1st part. 1000 w. Prac Engr-May 26, 1905. See also King-Riedler.

Riedler-Stumpf.-See Temperature; BLOWING ENGINE-Stumpf-Riedler.

AIR;

St. Louis Exposition.-See COMPRESSED COMPRESSED-AIR PLANT; PUMP. Schütz.-The Volumetric Efficiency of Air Compressors and Tests of Schütz Compressors at the "Centrum" and Fröhliche Morgensonne Mines, Westphalia (Ueber den Volumetrischen Wirkungsgrad der Kompressoren und Versuchsergebnisse

von Schütz'schen Kompressoren auf den Zechen "Centrum" und Fröhliche Morgensonne). R. Goetze. An illustrated description of experiments and results. 1500 w. Glückauf-Jan. 18, 1902. Selection.-Notes on the Selection of an Air Compressor. Gives a list of standard types, with remarks. 1800 w. Compressed Air-July, 1901. Specifications.-Specifications for an Air Compressor. Gives specifications for an air compressor for an air-lift pumping plant at Spring Lake, N. J. 1500 W. Eng News-March 2, 1905. Straight Line.-The Development of the Straight Line Air Compressor. R. S. Carter. Three illustrations, with descriptions, of types showing the periods of development, and the history of the machines. 900 w. Compressed Air-Oct.,

1903.

Temperatures.-Thermal Researches on Air Compressors (Thermische Untersuchung an Kompressoren). Fritz L. Richter. Data and results

of an exhaustive series of experiments to ascertain the temperature at various stages of the process in a Riedler-Stumpf air compressor. Three articles. 7500 w. Zeitschr d Ver Deutscher Ing-July 8. 22, Aug. 5, 1905. See also Cylinder Temperature. Test.-Air Compressors for Mining Operations (Luftkompressoren im Zechenbetriebe). An count of tests of many air compressors made by the Boiler Inspection Association of the Mines in the Dortmund District, Germany, with many illustrations and diagrams. 6 plates. 8000 W. Glückauf-March 28, 1903.

Tests of Air Compressors (Versuche an Luftkompressoren). Data and results of tests of single and double stage air compressors built by Meyer of Mühlheim, with indicator diagrams, and valve details. 1200 w. Glückauf-May 28, 1904.

Air-Compressor Tests (Versuche an Luftkompressoren). Data and results of two air compressors in actual service. 2000 w. GlückaufNov. 12, 1904.

Test, Brake Service.-Method of Making Competitive Tests of Capacity, Power Consumption, and

AIR CURRENT

Efficiency of Motor-Driven Compressors for Brake Service. Edward H. Dawson. Describes method. 1700 w. St Ry Jour-Feb. 27, 1904. Three Stage.-See Portable. Underground.-See Electric. Valves.-Inlet Valves and Their Relation to the Efficiency and Volumetric Capacity of Air Compressors. Fred. Brainard Corey. Calls attention to some of the peculiarities of inlet valves of the usual types with the object of aiding the designer and user in making an intelligent choice. 2300 w. Eng News-May 30, 1901.

Discussion of Mechanical Versus Poppet Valves for Air Compressors. J. A. Coombs. A letter giving the views of an English manufacturer of this class of machinery, with editorial. 1500 w. Compressed Air-Aug., 1901.

A Study of Air Compressor Valves. Arthur P. Hall. An account of a recent series of tests made to study the action of these valves and the usual velocity of the air through them. Ills. 2400 w. Compressed Air-Nov., 1904.

Progress in Valves for Air and Gas Compressors. Leicester Allen. Discussing the problems presented to the designer, the difficulties characteristic of various types of compressors, and the improbability of finding any completely satisfactory solution. 2600 W. The Engineering Mag azine, July, 1905.

See also AIR BRAKE; VALVE-Long Stroke. Valve Gear.-Air Compressors and Their Valve Gear. Charles Hurst. An illustrated article comparing the merits of automatic and positive valve-compressors. 2500 W. Engng Rev-Dec.,

1904.

Valve Motion.-An Improvement in Valve-Motion of Duplex Air Compressors. Sterling H. Bunnell. Illustrates and describes the construction. 1000 W. Trans Am Soc of Mech Engrs, No. 06Dec., 1903.

Vertical. A Vertical Compound Air Compressor at the "Minister Stein" Mine, Westphalia (Stehender Verbund Kompressor auf Zeche Minister Stein"). R. Goetze. A well illustrated description of this air compressor, and account of tests and operation. 1 plate. 3000 w. Zeitschr d Ver Deutscher Ing-Feb. 1, 1902.

Vertical Air Compressors. Brief Illustrated Descriptions of enclosed and open two-stage compound compressors as examples of recent Eng. lish practice, giving a test record. 800 W. Mines & Min-May, 1905.

Volumetric Efficiency.-See COMPRESSED AIR. Water-Wheel Driven.-A High Duty Air Compressor Driven by the Largest Pelton Wheel in the World. Describes arrangements at the Morning Mine. Idaho, for furnishing power for min ing operations. Ill. 900 W. Am Mach-Sept. 26,

1901.

Air Compression by Water Power. The Instalation at the Belmont Gold Mine. D. G. Kerr. Brief illustrated description of this plant, with reasons for its choice in preference to electricity. 2400 W. Can Min Rev-March 31, 1903.

Compressed Air on the Pacific Coast. Edward A. Rix. Illustrated and describes compressors driven by direct-connected water-wheels, and the various methods of using and reheating air. 4000 Mines & Min-May, 1905. Yield.-Yield of Air Compressors. J. Walter Pearse. Table and descriptive matter showing a general comparison of several of the prominent makes of compressors. Also editorial. 1400 W. Compressed Air-April, 1902. AIR COOLING.

Cooling Power and Conductivity of Air (Pouvoir Refroidissant et Conductibilité de l'Air). P. Compan. Note of experiments on the cooling off of a copper ball in a glass globe filled with dry air. 500 W. Comptes Rendus-Dec. 23, 1901. Automobiles.-See AUTOMOBILE, GASOLINE-Air Cooling; tric.

CAR, MOTOR-DRIVEN-Gasoline-Elec

AIR CUSHION. Automobiles.-See

AUTOMOBILE-Pneumatic Hub. AUTOMOBILE, GASOLINE-Twombly Kerosene. AIR FLOW.

See also AIR CURRENT; ANEMOMETER; COMPRESSED AIR-Transmission; GAS FLOW; STEAM FLOW.

Circular Orifices.-On the Measurement of Air Flowing Into the Atmosphere Through Circular Orifices in Thin Plates and Under Small Differences of Pressure. R. J. Durley. Describes experiments made at McGill University. Ills. 5000 W. Trans Am Soc of Mech Engrs (No. 081)-Dec., 1905. Discharge Coefficient.-An Experimental Determination of the Coefficient of Discharge of Air. Sanford A. Moss. Gives methods used in determining the co-efficient of discharge through an orifice under actual conditions of use, with results. 4800 W. Am Mach-Vol. 28, No. 32. Measuring Instruments.-The Measurement of Air Flow (Ueber die Messung von Luftgeschwindigkeiten). Dr. A. Marx. An exhaustive study of the measurement of the velocity of the flow of air in ventilating passages and conduits, discussing anemometers, pressure gauges and other instruments. Serial. Part I. 4500 W. Gesundheits Ingenieur-Aug. 20, 1904.

Mine Workings.-See AIR CURRENT; ANEMOMETERS.

Pipes. A Discussion of Ledoux' & Unwin's Formulae for the Flow of Air in Pipes, with Special Reference to Heating and Ventilating. H. Diederichs. 1300 w. Sib Jour of Engng-May, 1902.

Flow of Air in Pipes and the Transmission of Power by Compressed Air. Gives some theoretical considerations and calculations. 1200 W. Mines & Min-July, 1905.

Flow of Air in Metal Pipes. J. H. Kinealy. Gives formula and table with information. 2000 W. Am Soc of Heat & Ven Engrs-July, 1905.

Experimental Researches upon the Flow of Air in Pipes (Versuche über den Widerstand bel Bewegung der Luft in Rohrleitungen). H. Rietschel. An exhaustive report of tests made at the Government shipyards at Kiel. 12000 w. sundheits-Ingenieur.-July, 1905.

AIR GAP.

Reluctance.-See RELUCTANCE.

AIR GAS.

See CARBURETTED AIR.

AIR LIFT.

an illus

See also COMPRESSED AIR; LIFT-Pneumatic. Pneumatic Pumping Appliances. W. C. Popplewell. The gives present article trated description of various types of displacement pumps. Serial. 1st part. 2200 W. Mech Engr-June 14, 1902.

Raising Liquids from Shafts, Boreholes, etc., by Means of Compressed Air. Victor Petit, in "Petroleum Industrial and Technical Review." Illustrated descriptions of methods used. 1500 W. Compressed Air-July, 1902.

The Raising of Water by Compressed Air. Percy Griffith. Read before the Engng. Con. of the Inst. of Civ. Engrs. A brief summary of the principles governing the operation and of the essential details of construction in its application to the raising of water from wells and borings. 1800 w. Mech Engr-June 27, 1903.

Lifting Water by Compressed Air. Gustav C. H. Friedrich. Read before the Ohio Soc. of Mech., Elec. and Steam Engrs. Considers the airlift pump and the well. 2000 w. Engr, U S. AJuly 15, 1903.

Air-Lift Pumps. Extracts from a Paper by L. Darapsky, on "The Application of Compressed Air to the Raising of water," published in "Berg und Hüttenmännishe Zeitung, giving information concerning the history and progress of the

AIR LIFT

air-lift system. Ill. 3500 w. Engr, Lond-Dec. 11, 1903.

The Direct Elevation of Liquids by Compressed Air (Elévation Directe des Liquides par l'Air Comprimé). E. Lemaire. Illustrating various devices, including the air lift of Siemens, Laurend and Pöhle, as well as the suctions systems of Jandin and Borsig, and the pressure elevator of Kestner. 2500 W. Génie Civil-March 19, 1904.

River Wells and the Horizontal Delivery of Water. G. C. H. Friederich. Calls attention to results obtained by the air-lift system of raising water. 1500 w. Engr, US A-June 15, 1904.

Raising Water by Compressed Air. C. T. Alfred Hanssen. Explains the theory of the airlift pump, the conditions of maximum efficiency, etc. Ills. 4000 w. Engng Rev-July, 1904.

The Air Lift. Illustrated description of method of raising water by compressed air. 1500 w. Engr, US A-Aug. 15, 1904.

Arad, Hungary.-See WATERWORKS. Birkenhead.-Air-Lift Pumping Plant at Birkenhead. J. W. M. Richardson. Abstract of a paper read before the British Assn. of WaterWorks Engrs. and of the discussion thereon. Describes a plant put down to increase the water supply, giving particulars of the cost of working. 4200 w. Jour of Gas Light-July 19, 1904. Croton Aqueduct, N. Y.-The installation of a Pneumatic Pumping Plant. Arthur H. Diamant, Jr. Illustrating and describing the Harris pneumatic pumping plant for emptying the Harlem river siphon of the Croton Aqueduct, New York. W. Pro Am Soc of Civ Engrs-May, 1904.

5800

The Installation of a Pneumatic Pumping Plant. Elmo G. Harris. Discussion of paper by Arthur H. Diamant, Jr. 2000 w. Pro Am Soc of Civ Engrs-Oct., 1904.

Air-Lift Pumping Machinery at the Inverted Siphon of the New Croton Aqueduct, New York City. Begins an illustrated detailed description of the pumping apparatus. Serial. 1st part. 3300 W. Eng Rec-May 28, 1904.

Harris. The Harris System of Pumping by Compressed Air, as Applied at the Deloro Mine. J. P. Kirkgaard. Illustrates and describes the displacement method applied. 2500 w. Compressed

Air-July, 1902.

The Harris System of Pumping with Compressed Air. Elmo G. Harris. Illustrated description of apparatus and principles governing its operation. 1800 W. Mines & Min-May, 1905. See also Croton Aqueduct, N. Y. "Mammut."-Progress in the Applications of the Air-Lift Pump (Fortschritte im Bau von Mammut Pumpen). H. Steen. An illustrated description of recent installations of the "Mammut" system of air lift pumping for deep mine work in Germany. 3000 w. Glasers Annalen

Jan. 15, 1905.

Mexico City.-Air Lift Plant at the San Antonio Abad Cotton Mills in the City of Mexico. Juan Cuyas. Ilustrated description. with results of tests. 1000 w. Compressed Air-Aug., 1903. Point Pleasant, Pa.-Moving Water Horizontally by Air-Lift Pumps at Point Pleasant. Pa. Condensed from the "Metal Worker." Clark Howell. An illustrated account of the plant. 2000 W. Eng. News-Nov. 22, 1900.

Pratt City, Ala.-See WATERWORKS. Redlands, Cal.-Air-Lift Pumping Plant of the Redlands Water Co. An illustrated account of a test made in a plant in these irrigation works in California to determine its efficiency, with brief description of the plant. 1400 w. Eng Rec-Jan. 7, 1905.

Spring Lake, N. J.-See AIR COMPRESSOR-Specifications.

Starrett.-An Ingenious and Effective Air-Lift Pump. Illustration, with description, of pump invented by D. W. Starrett. 1500 w. Eng News-Nov. 24, 1904.

Tailings. See ELEVATOR.

AIR LIFT

Test.-Efficiency Trials of Air-Lift Pumping Plant. J. W. M. Richardson. Abstract of a paper read before the British Assn. of W.-Wks Engrs. An illustrated description of the plant of the Birkenhead Corporation. 3000 w. Mech Engr-Aug. 20, 1904.

Theory.-The Theory of the Air Lift. An explanation to the theory of operation of this apparatus for lifting water from wells. 1100 W. Compressed Air-Oct., 1905.

Tunbridge Wells.-The Raising of Water from Deep Wells and Borings by Compresed Air. William H. Maxwell. Read at meeting of the British Assn. of Water-Wks. Engrs. The writer's views of the special circumstances to which this system is particularly applicable, reviewing the general principles governing the work, and giving details of the plant at Tunbridge Wells. 2700 w. Engr, Lond-Aug. 14, 1903.

Raising Water by Compressed Air. William H. Maxwell. Read before the British Assn. of WaterWorks Engrs. Gives the working results of a plant on the "air-lift" system at Tunbridge Wells, with a general review of the conditions under which the system may be successfully applied. 3500 w. Engng-Nov. 13, 1903.

AIR LOCK.

See also BRIDGE FOUNDATION; CAISSON. Harlem River Tunnel-Special Pneumatic Lock for the Harlem River Tunnel. Illustrated description. 600 W. Eng Rec-Feb. 27, 1904.

Kiel Dry Dock.-An Air Valve for Regulating the Time of Passing Through an Air Lock; Used in the Kiel Dry-Dock Construction. Illustrated description of an apparatus to make it impossible for workmen to pass through the air lock in so short a time as to cause risk of injury. Also editorial. 1700 w. Eng News-Jan. 21, 1904. AIR PUMP.

See also CONDENSER. Condenser.-Capacity Test of a Unique Form of Air Pump. F. Meriam Wheeler. Describes a test made to ascertain the capacity of a new design of air pump for surface condensers, and especially intended for marine use. Ill. 2400 W. Trans Am Soc of Nav Archts & Marine EngsNov., 1900.

Condenser Air Pumps. W. H. Booth. On the importance of inspection and attention to small leaks. 1300 w. Am Mach-Jan. 31, 1901.

Air Pumps. W. H. Booth. Considers some of the defects of independent condenser plants. 2200 w. Power-Nov., 1904.

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The Engineering Index, 4권