66

OF THE

DOUBLE" SLIDE RULE,

SHEWING ITS APPLICABILITY TO

NAVIGATIO N.

INCLUDING SOME REMARKS ON GREAT CIRCLE SAILING,
AND VARIATION OF THE COMPASS,

WITH USEFUL ASTRONOMICAL MEMORANDA.

BY W. H. BAYLEY,
(LATE) H.M. EAST INDIA CIVIL SERVICE.

LONDON:

BELL & DALDY, 186, FLEET STREET.
1864.

184.9.