The New American Practical Navigator: Being an Epitome of Navigation, Containing All the Tables Necessary to be Used with the Nautical Almanac in Determining the Latitude, and the Longitude by Lunar Observations, and Keeping a Complete Reckoning at Sea : Illustrated by Proper Rules and Examples ...

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E. & G.W. Blunt, 1864 - Nautical astronomy - 749 pages
 

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Contents

A short introduction to astronomy and geography
45
Examples in geography
48
Questions to exercise the learner in plane sailing
58
A table showing how many miles of meridian distance correspond to a degree of longi
64
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
To find the difference between the true and apparent directions of the wind
97
Gauging
103
To survey a coast in sailing along shore
109
To reduce soundings taken at any time of the tide to low water
115
To find the time of high water by a Nautical Almanac
121
Description and use of a quadrant of reflection
128
To adjust a sextant
134
Adjustments of a circle of reflection 138
138
Description and use of a portable transit instrument
145
Tables for correcting the adjustments of a transit instrument
151
Variation of the compass
158
On the dip of the magnetic needle
164
To find the time of the moons passing the meridian
170
To find the latitude by the moons meridian altitude
171
To estimate the effects of small errors in the observations
179
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
To calculate a planets altitude
249
To allow for the change of rate in a chronometer
259
Journal from Boston to Madeira
265
Meridional parts 62
62
Suns declination 68
68
For reducing the suns declination 72
72
To find the correction and logarithm of a lunar observation when the sun is used 97
97
To find the correction and logarithm of a lunar observation depending on the moons altitude 98
98
For finding the third correction of a lunar observation 130
130
For turning degrees and minutes into time and the contrary 131
131
Proportional logarithms 132
132
For finding the latitude by two altitudes of the sun 148
148
Natural sines and cosines 160
160
Log sines tangents c to points and quarter points 169
169
To find the time of the moons passing the meridian 230
230
To find the suns right ascension 237
237
Variation of the suns altitude in one minute from noon 239
239
To reduce the numbers of Table XXXII to other given intervals from noon 243
243
Errors arising from a deviation of one minute in the parallelism of the surfaces of the central mirror 244
244
Longitudes and latitudes of the fixed stars 245
245
Reductions of latitude and horizontal parallax 246
246
Aberration of the fixed stars in right ascension and declination 247
247
Nutation in right ascension and declination 248
248
Augmentation of the moons semidiameter found by the nonagesimal 249
249
change of 100 seconds in its declination 251
251
Third correction in Lyonss improved method 275
275
Correction for a planet whose horizontal parallax is 35
326
364
336
ANAMBAS ISLANDS
356
ANDAMAN
362
APO BANK
369
CATALOGUE OF THE TABLES with examples of the uses of those not explained in other
386
Addition and subtraction using the signs as in algebra
395
To find the altitude and longitude of the nonagesimal
402
To calculate the longitude of a place from the observed beginning
409
To project an eclipse of the moon
415
To project an occultation of a fixed star
423
To find the longitude of a place by measuring the distance of the moon
429
Given the right ascension and declination to find the longitude
435
Redfields theory of storms C
443
ARABIA coast
448

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