The New American Practical Navigator: Being an Epitome of Navigation ...

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E. & G.W. Blunt, 1852 - Nautical astronomy - 777 pages
 

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Contents

A short introduction to astronomy and geography
45
Table of solutions of the varlous cases of Mercators sailing
47
Examples in geography
51
ទី ៩ ៩៩ ៥ ៥ ៥ ៥ ទ ទ ន ទ ៥ះដូដ ឧ ឧ ន
52
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
Meridional parts
78
Problems useful in navigation and surveying
89
To find the difference between the true and apparent directions of the wind
97
Gauging
103
To survey a harbor by observations on shore
111
To reduce soundings taken at any time of the tide to low water
115
Tides
120
Of the logline and halfminute glass
126
Suns declination
131
Description and use of a sextant of reflection
133
Verification of the mirrors and colored glasses
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
155
To calculate the true amplitude
159
To find the latitude by the meridian altitude of a planet
174
First method of calculating double altitudes
180
Third method
189
Fifth method to find the latitude from altitudes and distances used in taking a lunar
197
To find the latitude by the mean of several altitudes of the sun taken near noon by
206
A Equation of time
208
To find the time at sea by the moons altitude
213
To regulate a chronometer by equal altitudes of the sun
219
To find the longitude at sea by lunar observations
225
Examples of lunar observations
232
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 calculate the true azimuth
321
Meridional parts 62
62
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
Log sines tangents c to points and quarter points
171
Logarithmic sines tangents and secants
171
To calculate the variation by azimuths observed at equal altitudes before and after
230
To find the variation of the moons declination c 231
231
To find the suns right ascension 237
237
Variation of the suns altitude in one minute from noon 239
239
Variation observed
240
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
To find the time of the moons passing the meridian
248
Augmentation of the moons semidiameter found by the nonagesimal 249
249
Table Pago
251
Third correction in Lyonss improved method 275
275
ANAMBAS ISLANDS
356
ANDAMAN
362
APO BANK
369
CATALOGUE OF THE Tables with examples of the uses of those not explained in other
385
Addition and subtraction using the signs as in algebra
395
To find the ecliptic conjunction or opposition of the moon and sun
401
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
421
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
To find the longitude of a place from the beginning or end of a solar
443
ARABIA coast
448

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