Lectures on select subjects in mechanics, hydrostatics, pneumatics, and optics. With the use of the globes, the art of dialing, and the calculation of the mean times of new and full moons and eclipses / By James Ferguson.
- James Ferguson
- Date:
- 1760
Licence: Public Domain Mark
Credit: Lectures on select subjects in mechanics, hydrostatics, pneumatics, and optics. With the use of the globes, the art of dialing, and the calculation of the mean times of new and full moons and eclipses / By James Ferguson. Source: Wellcome Collection.
459/486 page 403
![« ^0 find the mean tune of full moon in any given year and month after the Chriftian Mra. Having col]et5led the moon’s mean motion from the fun for the beginning of the given year and I month, and fubtradled their fum from 12 figns, (as I in the former e^jample) add 6 figns to the remainder, I and then proceed in all relpeds as above* ' ' EXAMPLE 11. Required the mean time of full moon in September 1764? I Moon from fun* 10/// To the year after birth. 1753 10 92456 I Add compleat years —- 11 o lo 14 20 I (lum 1764) I And join September — 2 22 21 7 i . , , 1 The fum of thefe mean motioris is 1 12 0 23 1 Which, being fubtr. from a cirelcj or 12 0 0 0 ^ Leaves remaining — — 10 17 59 37 To which remainder add — 6 0 0 0 j And the fum will be ~ ~ 4 17 59 37 Next lefs mean mot. for 11 days, fubt. 4 14 5 54 And there rerhains -— — 3 53 43 Next lefs mean mot. for 7 hours, fubtr. 3 33 20 And the remainder will be — 20 23 1 Next lefs mean mot. for 40 min. fubt. 20 19 Remains the mean mot* for 8 fee. k fi 4 D d 2 So, j i !](https://iiif.wellcomecollection.org/image/b30501003_0459.jp2/full/800%2C/0/default.jpg)
