American Practical Navigator

Front Cover
U.S. Government Printing Office, 1841 - Navigation
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Contents

Examples in geography
51
A table of solutions of the several cases of plane sailing
62
Table of solutions of the several cases of middle latitude sailing
68
Table to correct the middle latitude
76
Table of solutions of the various cases of Mercatois 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
Tides
120
Of the logline and halfminute glass
126
Description and use of a sextant of reflection
133
To measure the angular distance of the moon from a star
137
Verification of the mirrors and colored glasses
143
To observe the transit of any heavenly body over the meridian
150
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 estimate the effects of small errors in the observations
179
Second method
185
Third method lf
193
To find the latitude by one altitude ofthe sun having your watch previously regulated
200
To find the latitude by the polar star
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
Second method of working a lunar observation
239
Table of corrections for second differences
245
Method of combining several lunar observations and determining the error of the chro
251
To allow for the change of rate in a chronometer
257
To correct the dead reckoning
263
Third correction in Lyonss improved method
275
Explanations of sea terms
288
Evolutions at sea
304
Right ascensions and declinations of the fixed stars BO IX Suns rising and setting 84
84
For rinding the distance of terrestrial objects at sea 86
86
Proportional parts 87
87
Refraction of the heavenly bodies 88
88
To find the correction and logarithm of a lunar observation when a star or either of the planets Venus Mars Jupiter or Saturn is observed 89
89
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 M8 XXIV Natural sines and cosines 160
160
Logarithms of numbers 169
169
Logarithmic sines tangents and secants 185
185
To find the time of the moons passing the meridian 380
230
To find the variation of the moons declination kc 231
231
To find the suns right ascension 237
237
Variation of the suns altitude in one minute from noon 289
239
To reduce the numbers of Table XXXII to other given intervals from noon 13
240
Errors arising from a deviation of the telescope from a plane parallel to the plane of the instrument 244
244
Longitudes and latitudes of the fixed stars 245
245
Reductions of latitude and horizontal parallax 240
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 semidiarncter found by the nonagesimal 249
249
Catalogue of the Tables with examples of the uses of those not explained in other
385
APPENDIX
393
To find the ecliptic conjunction or opposition of the moon and sun
399
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 measuring the distance of the moon
427
Given the latitude of the moon and longitude of the moon and sun
433
Rcdfields theory of storms c
440
To find the longitude of a place from the beginning or end of an occul
446
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