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LAW OF STORMS

Wind

NE

Wind

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

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East

I

needle

N

Wind

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

Wind

N W

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When these Circles are used thou should be cut out and moved along

„Marun chart in the direction of a Storm'è progress

Dipped in turpentine they will become transparent

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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.

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LONDON:

PALMER and CLAYTON, Printers,

10, Crane Court.

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