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PROB.
26. To find the two Days on which the Sun is in the Zenith
of any given Place, &c.
27. To find where the Sun is vertical on a given day and Hour....
28. At a given Time of the Day in one Place, to find at the
same Instant those Places where the Sun is rising, sct-
ting, &c.
29. To find all those places within the Polar Circles, on which
PAGE
255
ibid.
256
30. To make Use of the Globes as a Tellurian
31. To rectify the Globe to the Latitude and Horizon of any
Place....
262
32. To rectify for the Sun's Place
....
33. To rectify for the Zenith of any Place..
Of exposing the Globe'to the Sun
34. To observe the Sun's Altitude
35. To place the Globe, when exposed to the Sun, that it may
represent the natural positions of the Earth.... .... 268
263
266
36. To find naturally the Sun's Declination...
270
37. To find naturally the Sun's Azimuth...
271
38. To shew where the Sun will be twice on the same Azimuth
43. Given the difference of Latitude, and difference of Longi-
297
.........
tude, to find the Course and Distance sailed ....
44. Given the difference of Latitude and Course, to find the
difference of Longitude, and Distance sailed
45. Given the difference of Latitude and Distance run, to
find the difference of Longitude, and Angle of the
Course
46. Given the difference of Longitude and Course, to find the
difference of Latitude, and Distance sailed
298
47. Given the Course and Distance, to find the difference of
Longitude and Latitude ....
48. To steer a Ship upon the Arch of a Great Circle, &c... 301.
Of the Terrestrial Globe, mounted in the common Manner.. 303
1. To find the Latitude and Longitude of any given Place on
the Globe.... .
2. To find the difference of Longitude between any two given
Places
.....
3. To rectify the Globe for the Latitude, Zenith, aud Sun's
Place
4. The Hour of the Day at any Place being given, to find all
those on the Globe, where it is Noon, Midnight, or
any given hour at that time
5. The Hour of the Day at any Place being given, to find the
correspondent Hour (or what o'clock it is at that time)
any other Place
in
6. The Day of the Month being given, to find all those
Places on the Globe where the Sun will be vertical, or
in the Zenith, that Day
.......
7. A Place being given in the Torrid Zone, to find those two
Days of the Year on which the Sun will be vertical to
that Place....
304
305
ibid,
306
307
3. To find the Antœci, Perioci, and Antipodes of any given
308
9. To find at what Hour the Sun rises and sets any Day in
the Year, at any Place, and also upon what Point of
the Compass
10. To find the length of the Day and Night at any time of
the Year
11. To find the length of the longest or shortest Day, at any
Place upon the Earth.....
309
310
12. To find all those inhabitants to whom the Sun is this mo-
ment rising or setting, in their Meridian or Midnight.. 311
13. To find the beginning and end of Twilight ...... 312
Of the Use of the Celestial Globe, mounted in the common
manner
314
Of the Precession of the Equinoxes
1. To represent the Motions of the Equinoctial Points back-
wards, or in antecedentia, upon the Celestial Globe..
319
320
324
3. To find the Declination and right Ascension of the Sun.. 326
4. To find the Sun's oblique Ascension, &c.
7.
the Length of the longest and shortest day in
Latitudes under 66 Degrees
...
328
8.
the Latitude where the longest day may be of
any given length between twelve and twenty-four
Hours.
9.
the Time of Sun-rising, &c..
329
10.
how long, &c. the Sun shines in any Place within
the Polar Circle
330
11. To illustrate the Equation of Time, &c.
334
336
12. To find the right Ascension, &c. of a Star...
13.
14.
15.
dian
the Latitude and Longitude of a Star.....
the Place of a Star on the Globe by, &c....... 337
at what Hour a given Star transits the Meri-
......
16. On what Day a Star will come to the Meridian 17. To represent the Face of the Heavens for any given day
and hour
18. To trace the Circles of the Sphere in the Heavens
19. To find the Circle of perpetual Apparition.....
the Sun's Amplitude.....
338
when the Sun is due east in a given Latitude.. 349 the Rising, Setting, Culminating, &c. of a Star.. 350 the Hour of the Day, the Altitude and Azimuth
of a Star being given...
the Altitude and Azimuth of a Star, &c... the Azimuth, &c. at any Hour of the Night.... 353
27. To find the Sun's Altitude, and the Hour, from the Lati
tude, the Sun's Place, and Azimuth..
28.
29.
30.
31.
32.
the Hour, the Latitude and Azimuth given a Star, the Latitude, Sun's Place, Hour, &c.
given
the Hour by Data from two Stars....
the Hour by Data from two Stars...
the Latitude by Data from two Stars..
33. The Latitude by other Data from two stars
34.
35.
36.
37.
when a Star rises or sets cosmically
when a Star rises or sets achronically
when a Star will rise heliacally
when a Star will set heliacally...
45. To find the Azimuth of the Moon, and thence High
Water, &c....
381
Of Comets....
382
46. To rectify the Globe for the Place of Observation 384
47. To determine the Place of a Comet
48. To find the Latitude, &c. of a Comet...
385
49. To find the Time of a Comet's Rising, &c..
50. To find the same at London.....
386
51. To determine the Place of a Comet from an Observation
made at London
52. From two given Places to assign the Comet's path.... 387
53. To estimate the Velocity of a Comet
54. To represent the general Phenomena of a Comet
A Description of the most improved Planetarium, Tellurian,
and Lunarium...
391
FROB.
Description of the Planetarium
Description of the Tellurian...
Description of the Lunarium
An Introduction to Practical Astronomy, in which is intro-
duced a variety of curious Problems, from...
to the end of the Work.
Table of the Ecliptic Motions of the Planets, as given by
392
409
427
435
517
518
519