ee a re "V 
x DT x AE, 
be c Wal nem hid fui of f 
| By proportion, y y svit i 5549 ai A from the fun was 5f 7 33 
T F 
MATHEMATICAL PAPERS, (m 
Thea apparerit diameters of the (uh and Mercury are ps de- 
termined by obfervation. | 
s " W IM 
By | ien micrometer meafures, Mercury’ s dain was 914247, 
The diam. of the fun by the microm, meafures was 32" 21, 85 
By the time of it's pafling the meridian, — . nae 32 24; 20 
The mean of which may be taken as moft exact, _ 32, 22, 9 
- The leaft diftance of centers is alfo had from tifrik: 
By the micrometer meafures this was. 5 -1 5 435 em | 
6 . 
To examine the obfervations made by the micrometer, I com- 
puted by trigonometry what the leaft diftance of centers would 
be by calculation from the obfervations of the iini ua 
refult gives the leaft diftance 
By my obfervations of the external — Co 4b t 
Seb | Wc cud 
The men: is "s ane as by thie micrometer, ^ I 5 4D 73 
7 From the obfervations of the diameters and leaft diftance of 
centers, - "we. may compute the length of the apparent tranfit- 
din » T ges Mercury s wale, Ae pense a froo, Doi. lá 
emi-diameter pori um 
the fum of Sz; and SM by their difference, the fquare root of 
the product will be n barre of Tu. | gi a: a Xil 
rom 
