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DEFINITIONS

IN

ASTRONOMY AND NAVIGATION

MADE EASY

DEFINITIONS

IN

ASTRONOMY AND NAVIGATION

MADE EASY

BY THE

REV. J. B. HARBORD, M.A., R.N.

AUTHOR OF GLOSSARY OF NAVIGATION'

WILLIAM BLACKWOOD & SONS, EDINBURGH & LONDON;

J. D. POTTER, 31 POULTRY, AND 11 KING STREET,
TOWER HILL, LONDON; JAMES GRIFFIN, PORT-

SEA; AND COLMAN & SON, DEVONPORT.

MDCCCLXV.

184.9

BODE

BIBL

PREFACE.

THE following abstract contains a few hints intended to aid naval students in acquiring the habit of giving correct definitions in navigation. One branch of the science is selected, and its fundamental definitions given as examples. The custom of learning definitions by heart and trusting to memory for them at examinations is very injurious, and quite unnecessary if study is conducted with a little system, and definite ideas secured at each step. A knowledge of the derivation of technical terms is also a great help in mastering the preliminaries of a science; the terms used in navigation will be found fully explained in the author's Glossary of Navigation.'*

* William Blackwood & Sons, Edinburgh and London, 1863; sold by J. D. Potter, Admiralty Chart Agent, London.

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