New American Practical Navigator

U.S. Government Printing Office, 1874 - Nautical astronomy

Demonstration of the most useful propositions of geometry 7	7

Demonstration of theorems in plane trigonometry	13

Construction of the plane scale	18

Description and use of the sector	25

Division by logarithms	31

Logarithms in Lyonss improved method	35

Table of solutions of the various cases of trigonometry	37

A short introduction to astronomy and geography	45

Second method	185

Questions to exercise the learner in working double altitudes	193

To find the latitude by one altitude of the sun having your watch previously regulated	200

To find the time at sea and regulate a watch	208

To find the time at sea by a planets altitude	215

To regulate a chronometer by means of a transit instrument	221

General remarks on the taking of a lunar observation	228

Fourth method or Witchells improved method of finding the true distance	243

Mexico	48

Examples in geography	51

Questions to exercise the learner in plane sailing	58

A table showing how many miles of meridian distance correspond to a degree or longi	64

251	70

Table to correct the middle latitude	76

Table of solutions of the various cases of Mercators sailing	79

To work a compound course by middle latitude or Mercators sailing	86

IV	96

To find the difference between the true and apparent directions of the wind	97

Gauging	103

275	107

To survey a coast in sailing along shore	109

To reduce soundings taken at any time of the tide to low water	115

Tides	122

Description and use of a quadrant of reflection	128

To adjust a sextant	134

Refraction of the heavenly bodies	136

Adjustments of a circle of reflection	138

Description and use of a portable transit instrument	145

Tables for correcting the adjustments of a transit instrument	151

To find the distance of the land in order to calculate the dip	155

To calculate the true amplitude	159

To find the latitude by a meridian altitude of the sun or a fixed star	166

To find the latitude by the moons meridian altitude	171

To find the latitude by double altitudes of the moon	178

III Dip of the horizon	246

To calculate a planets altitude	249

Precautions in using a chronometer	259

Journal froin Boston to Madeira	287

Reduction to any other parallax	62

Suns parallax in altitude	88

sun is used	97

X	131

X	230

noon	243

APPENDIX	249

BANCAIsland	336

ANAMBAS ISLANDS	356

ANDAMAN	362

ΑΡΟ BANK	369

ARABIA coast	379

To find the horary motion of the moon	398

To calculate the longitude of a place from the observed beginning	407

To find the longitude of a place from the beginning or end of a solar	413

To project an occultation of a fixed star	421

To find the longitude of a place by the moons passage over	427

Given the latitude of the moon and longitude of the moon and sun	433

Theorems in spherics	439

Redfields theory of storms	447

To find the longitude of a place from the beginning or end of an occul	468

Title	New American Practical Navigator Issue 9 of H.O. pub
Contributors	Nathaniel Bowditch, Jonathan Ingersoll Bowditch, United States. Hydrographic Office
Publisher	U.S. Government Printing Office, 1874

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