Analysis of a course of lectures : on mechanics, hydrostatics, pneumatics, and astronomy / read by James Ferguson.

  • James Ferguson
Date:
1761
Catalogue details

Licence: Public Domain Mark

Credit: Analysis of a course of lectures : on mechanics, hydrostatics, pneumatics, and astronomy / read by James Ferguson. Source: Wellcome Collection.

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    [24 ] and planets, It is a reprefentation of the vifible heavens, to an eye fuppofed to be placed in its center.—But becaufe it would be impoftible to have thefe in a complete hollow ball of glafs, unlefs it were made up of two hemifpheres joined together, the ftars are laid down on the furface of an opake globe. The fun and planets are continually changing their places, and therefore they cannot be marked any other way than by a pencil or chalk occafionally. The chief 'problems which may be folved by a terrefirial globe, properly fitted up, are as follow. 1. To find the latitude and longitude of any given place, 2. The latitude and longitude being given, to find the place. 3. To find the difference of latitude, or difference of longitude, between any two given places. 4. A place being given, to find all thofe places which have the fame latitude or longitude with it. 5. To find the antacid perigeei9 and antipodes of any given place. 6. To find the diftance between any two given places. 7. A place being given, and its true diftance- from any other place, to find all the other places which are at the fame diftance from the given place., 8. The hour of the day at any place being given, to find all thofe places where it is noon at that time. 9. The hour at any place being given, to find what o’clock it then is at any other place. 10. To find the fun’s place in the ecliptic* and his declination. 11. The day of the month being given, to find all thofe places over which the fun will pafs verti¬ cally on that day. iz.. A
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