THE

COMPLETE MATHEMATICAL

AND GENERAL

NAVIGATION TABLES,

INCLUDING

EVERY TABLE NECESSARY TO BE USED WITH THE NAUTICAL ALMANAC IN FINDING THE

LATITUDE AND LONGITUDE :

WITH THEIR DESCRIPTION AND USE,

COMPRISING THE PRINCIPLES OF THEIR CONSTRUCTION, AND THEIR DIRECT APPLICATION TO

PLANE AND SPHERICAL TRIGONOMETRY,

NAVIGATION,

Nautical Astronomy,

DIALLING, PRACTICAL GUNNERY, MENSURATION, GUAGING, &c. &c.

BY THOMAS KERIGAN, R. N.

AUTHOR OF "THE YOUNG NAVIGATOR'S GUIDE TO THE SIDEREAL AND PLANETARY PARTS
OF NAUTICAL ASTRONOMY."

IN TWO VOLUMES:

VOLUME HI.

LONDON:

PUBLISHED BY BALDWIN AND CRADOCK, PATERNOSTER-ROW; PARBURY,
ALLEN, AND CO., AND J. W. NORIE, LEADENHALL-STREET.

X.

XI.

Correction of the mean astronomical refraction

6

7

7

8

9

To find the latitude by the north polar star ...

Correction of the latitude deduced from the preceding table....

XII. Mean right ascension of the sun.....

....

XIII. Equations to equal altitudes of the sun, part First...

XIV. Equations to equal altitudes of the sun, part Second

XV. To reduce the sun's longitude, right ascension, and declination;

and, also the equation of time, as given in the Nautical Almanac,

to any given time under a known meridian

XVI. To reduce the moon's longitude, latitude, right ascension, declin-

ation, semi-diameter, and horizontal parallax, as given in the

Nautical Almanac, to any given time under a known meridian

XVII. Equation of the second difference of the moon's place..

XVIII. Correction of the moon's apparent altitude

10

13

16

17

XIX. To reduce the true altitudes of the sun, moon, stars, and planets,

to their apparent altitudes....

XX. Auxiliary angles...

XXI. Correction of the auxiliary angle when the moon's distance from a

planet is observed ....

37

XXII. Error arising from a deviation of one minute in the parallelism of

the surfaces of the central mirror of the circular instrument of

reflection....

XXIII. Error arising from an inclination of the line of collimation to the

plane of the sextant, or to that of the circular instrument of re-

flection

....

XXIV. Logarithmic difference