PAPER AND STATIONERY
Warehouse.
JOHN G. HODGE & CO.,
Cor. Sansome and Sacramento sts.,
SAN FRANCISCO.
IMPORTING AND MANUFACTURING
STATIONERS,
Keep Blank Books, Stationery, School Books,
Cheap Publications, LOG BOOKS, Shipping
Articles, Rolls of Sale of Vessels, etc., etc.
The Best Grades at Lowest Prices.
G. W. BREWER.M. P. McLAUGHLIN.
McLAUGHLIN & BREWER,
REAL ESTATE
AGENTS,
No. 328 MONTGOMERY STREET,
(Office No. 9,)
SAN FRANCISCO.
THE LAW OF STORMS:
THE VARIOUS PHENOMENA BY WHICH THEIR
APPROACH CAN BE ASCERTAINED WITH
CERTAINTY, AND PRACTICAL
DIRECTIONS TO MARINERS
FOR THE AVOIDANCE
OF THEIR FURY.
COMPILED FROM VARIOUS SOURCES
BY
CAPT. JOHN ROSS.
A. ROMAN & COMPANY,
Booksellers, Publishers and Importers,
417 and 119 Montgomery Street, San Francisco.
27 HOWARD ST., NEW YORK.
1869.
Entered according to Act of Congress, in the year 1869,
By Capt. John Ross,
In the Clerk’s Office of the District Court of the United States
for the Northern District of California.
Printed by SPAULDING & BARTO,
Mining and Scientific Press Job Office,
414 Clay Street, San Francisco.
ON HURRICANES AND THE
LAW OF STORMS.
In the Northern Hemisphere, when the Polar and Equatorial currents ofair are alternating with each other, the regular shifting of the windround the compass will be through S., S.W., W., N.W., N., N.E., E.,S.E., S.—and the changes will take place oftener between south andwest, and between north and east, than between west and north, andbetween east and south.
Similarly in the Southern Hemisphere, it may be inferred that whenPolar currents of air alternate with Equatorial, the regular shiftingof the wind round the compass will be successive through S., S.E., E.,N.E., N., N.W., W., S.W., S.
This is Dove’s “Law of Gyration,” (or the law of the rotation ofwinds). And collecting the main points into a few general propositions,it may be laid down, that all steady winds are modified by the rotationof the earth, in such a manner that Equatorial currents of air receivea westerly deflection, and Polar currents an easterly deflection; butlatitudinal currents suffer no change. The N.E. and S.E. Trade Windsare steady Polar currents. The Monsoons are alternations of a Polar andan Equatorial current, twice during the year. Therefore they are N.E.and S.W. in the Northern Hemisphere, and S.E. and N.W. in the Southern Hemisphere.[4]
The S.W. passage wi