Page:Mathematical collections and translations, in two tomes - Salusbury (1661).djvu/305

9799800

403400

———————

39199200

293994000

39199200000

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27|000000

145|3953|239320

1058|000000

3|0000000

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In the sixth operation the chord, the sines and Parallax are as followeth, and the star is found to be about 4. semidiameters; let us see whether it will be reduced, abating the Parallax from 8 m. to 1 m. onely; Here is the operation, and the star raised but to 27. semidiameters or thereabout; therefore the correction of 7 m. in 8 m. doth not suffice.

Angles	$\scriptstyle {\left\{{\begin{matrix}\ \\\\\ \\\ \ \end{matrix}}\right.}$	BD	Chord	1920
		BDC	Sine	40248
		BCD 8gr.	Sine	233

 

40248|00

1920|00

——————

804960|00

362232|0000

40248|00000

———————

26|0000000

29|772|7616000

198|0000000

1|00000000

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In the eighth operation the chord, the sines, and the Parallax, as you see, are these ensuing, and hence the Authour calculates the height of the star to be 1. semidiameter and an half, with the Parallax of 43. min. which reduced to 1 min. yet notwithstanding giveth the star lesse remote than 24. semidiameters, the correction therefore of 42. min. is not enough.

Angles	$\scriptstyle {\left\{{\begin{matrix}\ \\\\\ \\\ \ \end{matrix}}\right.}$	BD	Chord	1804
		BDC	Sine	36643
		BCD	Sine	29

36643