C 26 s ] 
it . 
A A reprefents the Sun’s fuperior limb. 
V Venus entirely upon the Sun only joined to his 
limb by the tail bb> which decreafed in 
breadth till the inftant of reparation : the 
length of this tail feemed equal to 4. of 
Venus’s diameter. 
The calculation of this tranfit of Venus over the 
Sun, was made from tables corrected by that of the 
6th June 1761 ; and, compared to obfervation, give 
the following differences. 
Calculation 
Obfervation 
Difference 
h / ff 
k / /' 
/ n 
External conta£ls 
7 3 33 ’° 
7 9 20)0 
+ 5 47 
Internal contacts 
7 22 27,0 
7 27 43,0 
-1- 5 16 
Interval of contacts 
0 18 54)0,0 18 23 0 
— 0 31 
June 4 th light clouds flying and Fahrenheit’s Thermometer at 
6 o° I took the following equal altitudes of o fuperior limb. 
A. M. 
Alt. 
P. M. 
Moon by clock 
b ' // 
O / 
9 44 60 
53 00 
ft 
45 5 8 >° 
’3 15 
* 
47 49 0 
53 3C 
49 40,0 
53 4. 
Cloudy 
51 36.0 
54 
- 53 290 
54 15 
June 3th cloudy 
2 Vol. LX. M m ' June 
