LAW OF STORMS

Wind

NE

Wind
East

Circle to assist Seamen in the practical application of the theory of revolving Winds

I

needle

Wind

In moving the Circle the Needle to be kept parallel to the magnetic meridian

Wind

N W

moving the rele the Needle to be kept parallel

When these Circles are ured they should be cut out and moved along

Moune chart in the direction of a Morm's progress
Dipped in turpentine they will become transparent

London Biblished by John While thigh born

BY LIEUT-COLONEL W. REID, C.B., F.R.S.

(Of the Royal Engineers.)

LONDON:

PUBLISHED BY JOHN WEALE,

LIBRARY OF CIVIL, MILITARY, AND MECHANICAL ENGINEERING,
59, HIGH HOLBORN.

LONDON:

PALMER and CLAYTON, Printers,

10, Crane Court.