TIDAL CONSTANTS

FOR VARIOUS British, Irish, AND EUROPEAN PORTS.

By applying the Tidal Constant of the place, according to its sign (+ add, sub.), to the time of high water on the given day at the port of reference, you have the time of high water at the place sought.

WEATHER FORECAST FOR MAY, 1879.

THE CURRENTS OR TENDENCY OF THE AIR OVER THE BRITISH ISLANDS FOR THE MONTH OF MAY, 1879.

NOTE.-Sun's gradients from the 1st to the 19th S. Westerly rising. They will then probably make a retrograde movement, becoming N. Easterly, and causing N. Westerly winds during the remainder of the month.

1. The Table indicates

REMARKS.

Probable Winds.

Strong N. Westerly tendency from the 1st to the 3rd, Light, variable.

39

N. Easterly

5th

S. Easterly

N. Westerly

23rd

2. Moon going South from the 1st to the 8th.

3. Change from the Westerly to the Easterly Currents about the 5th.

14th.

13th, Very stormy.
about the 6th.
during this period, with snow or sleet. Severe
thunderstorms about the 9th. Thunderstorms
also probable about the 18th, 23rd, and 29th.
22nd, Generally fine.

Strong South-Easterly gale probable
Strong Easterly winds general

31st, Changeable.

Temperature comparatively low. As the conditions are nearly the same, a recurrence of the weather experienced during April may be expected, although of a somewhat milder type.

D. D.

DEATH OF PROFESSOR HEINRICH WILHELM DOVE.-We regret to have to record the death of Professor Dove. He was best known in this country by his meteorological investigations, especially those relating to the Law of Storms and the Distribution of Temperature over the Surface of the Globe; but his numerous memoirs, written between the years 1827 and 1873, show that he was a careful observer and investigator in magnetism, electricity, optics, and other departments of physics. It was, however, as a meteorologist that he justly earned a European reputation; to him our own Meteorological Office has, from time to time, been greatly indebted, and he was the most active promoter of the storm-signal department in Germany. As Professor and Lecturer at the Universities of Königsberg and Berlin, he was equally remarkable for the range and accuracy of his science, and for the lucidity with which he expounded his subjects. Born at Liegnitz in 1803, he died, full of honours, at Berlin, in the seventy-sixth year of his age.

MARINE INVENTIONS.

Monthly List of Patents-Communicated by Messrs. Wm. P. Thompson & Co., British and International Patent and Trademark Agents and Consulting Engineers, 323, High Holborn, London, W.C., and 6, Lord Street, Liverpool.

ENGLISH (APPLICATIONS.)

1093. Robert Lindsey, Kingston-upon-Hull, York. "Improvements in the means or apparatus employed for plugging marine and other boiler tubes."

1160. John Richardson Wigham, Monkstown, Dublin. "Improvements in illuminating lighthouses and other places."

66

1190. George Allix, Southampton. An improved fid for the upper masts of yachts and other vessels."

1211. William Stroudley, Brighton. "A new or improved speed indicator for locomotive, marine, and other engines."

1220. James Clark, Barrow-in-Furness. "Improvements in and relating to tackle and gear for lowering, raising, and detaching ships' and other boats."

"Im

1229. Henry William Hemsworth, Southend, Essex. provements in apparatus for raising ships, anchors, telegraph cables, and other submerged property, such improved apparatus being also applicable to other purposes."

1247. James Bennie Scott, Pollockshields, Renfrew.

provements in steering-engines."

"Im

1248. Charles B. Lee and Caldwell C. Jenkins, Pennsylvania, U.S.A. "Improvements in apparatus for regulating the speed of marine and other steam-engines." (A communication.)

1292. Robert Bruce Smith, Glasgow. "Improvements in steering engines and reversing engines, and in valves for the same and for other engines."

1330. John Isaac Thornycroft, Chiswick, Middlesex. "Improvements in propelling and steering ships or vessels and apparatus therefor."

G

1337. Henry Burgess Young, Greenwich. "Improvements in screw propulsion."

1338. John Eccleston, Liverpool, and 323, High Holborn, Middlesex. "Improvements in apparatus for steering ships and other vessels."

1361. Joseph Olguin, Cambridge Gardens, Middlesex. improved apparatus for the loading and unloading of vessels."

"An

1367. Samuel Marsh, Calais, France. "Improvements in the method of and apparatus for ventilating coal and other mines, coal laden and other vessels, and other confined spaces." (A communication.)

1423. Agostino Rolando, City Road, Middlesex. ments in apparatus for saving life at sea."

"Improve

1446. Alfred Julius Boult, of the firm of Wm. P. Thompson & Co., 323, High Holborn, London, W.C., and 6, Lord Street, Liverpool, British and International Patent Agents (communication in trust from Charles Lyman Garfield, New York, U.S.A.) "Improvements in processes and means for preventing and extinguishing fires in buildings or on board of ships." Specification.)

AMERICAN.

(Complete

211705. Joseph Corduan, Brooklyn, N.Y. "Water-mattresses for ships."

211738. Marcus Hulings, Oil City, Panama.

ernors."

"Marine gov

212506. Daniel Risher, Dravosburg, Pa. "Lock-gates."

AUSTRIAN.

2949. E. Becker and H. Krueg, Vienna. "Improvements in

apparatus for loading and unloading corn ships."

2967. C. Brava, A. Kloger, and H. Eidner, Vienna. "An apparatus for raising wrecks, goods, &c., from the bottom of the sea without any connection with the surface."