Bulletin of the United States Geological SurveyThe Survey., 1910 |
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8.-Analyses of coals anthracite coal Appraiser's April Ash in Date Ash in dry August Average Bell County bidder bituminous coal boiler British thermal units Buckwheat building BULLETIN Bureau Cambria County ceived cent ash Cherokee Clearfield County coal as received coal containing coals delivered Coking contractor cost COURT-HOUSE AND POST-OFFICE CUSTOM-HOUSE December dry coal dry Corrected price dry Mois Egg anthracite F STREET NW Fayette County fiscal Fixed carbon fuel Furnace anthracite G STREET Geological Survey Government under contracts heating value INTERIOR DEPARTMENT January July June Kind of coal Lehigh livered McDowell County mines moisture November October percentage of ash Philadelphia phur Pittsburg Pittston Pocahontas pounds price per Fixed Proximate analysis purchase of coal purchasing coal Raleigh counties River Schuylkill County September Sewell smokeless Somerset County specifications Stove anthracite sulphur t. u. Ash TABLE 8.-Analyses tests tile matter Total Treasury Department ture United States Geological Vola Volatile matter WASHINGTON Youghiogheny
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35 페이지 - ... of the covenants, stipulations, and agreements of said contract on the part of the said contractor to be performed as therein set forth, the said contractor and his sureties shall forfeit and pay to the United States of America the sum...
77 페이지 - Experimental work conducted in the chemical laboratory of the United States fuel-testing plant at St. Louis, Mo., January 1, 1905, to July 31, 1906, by NW Lord.
77 페이지 - BULLETIN 367. Significance of drafts in steam-boiler practice, by WT Ray and Henry Kreisinger. 1909. 61 pp. BULLETIN 368. Washing and coking tests of coal at Denver, Colo., by AW Belden, GR Delamater, and JW Groves.
20 페이지 - On the basis of the adjusted price, allowance shall then be made for the varying heat values by computing the cost of 1,000,000 British thermal units for each coal offered. This determination...
5 페이지 - BULLETIN 339. The purchase of coal under government and commercial specifications on the basis of its heating value, with analyses of coal delivered under government contracts, by DT Randall. 1908.
35 페이지 - If the bidder to whom the first award may l>e made should fail to enter into a contract, as herein provided, then the award may be annulled and the contract let to the next...
7 페이지 - Under present conditions the moisture is an important element in the valuation of a ton of coal. It is evidently necessary to consider the coal just as it is received in order to determine its value to the consumer, but chemical reports should be made on the basis of both the "dry coal
39 페이지 - Maximum limits for ash," on page 4, may be accepted. Frequent or continued failure to maintain the standard established by the contractor, however, will be considered sufficient cause for cancellation of the contract. PRICE AND PAYMENT.* Payment will be made on the basis of the price named in the proposal for the coal specified therein, corrected for variations in heating value and ash, as shown by analysis, above and below the standard established by contractor in this proposal.
8 페이지 - Size of Coal. — The size of the coal influences the capacity of any given equipment, owing to its effect on the draft. With a poor draft fine coal can not be burned in sufficient quantities to maintain the rated capacity. If thin fires are resorted to, the efficiency is usually lowered as a result of an excessive supply of air through holes in the fire. As a rule, when dust and very fine coal are fed into the furnace they either check the flow of air or are taken up by the draft and after being...
11 페이지 - ... to the consideration of price and quality. For manufactured articles and materials of constant and uniform quality they generally can be reduced to a clear statement of what is desired. For coal, however, the variation in character makes this impracticable. "This lack of uniformity is the feature recognized and provided for in the coal specifications prepared by the Geological Survey. Under these specifications, bidders are requested to quote prices on the various sizes of anthracite, a definite...