[ 4i8 } 
to it, and made fome rack- work, by which I coultb 
keep the fame part of the Sun’s limb in the field 
with eafe j my companion w'as not 'fo well provided 
with a telefcope, the one he ufed being of Dollond’s- 
refracting glaffes of 4I feet. This we fixed, with a 
ball and focket, to a poft, by which it was eafily di- 
rected to the Sun. Thus furnidied, we found the 
contacts to take place as follows, reduced to mean 
time. 
h ' / tr 
Owen Biddle’s External contaCt at 
Internal one at 
Joel Bayley’s External contaCt was' 
loft by an accident, but feen by him, 
after it had taken place, at 
Internal ditto 
2 
2 
1 1 
29 
12 
53 
53 . 
13 
2 29 53 
It muft be noted, the internal contaCt, given by 
Owen Biddle, is at four feconds before the thread 
of light had broken the dark ligament or protu- 
berance, by which Venus’s limb was united to' the 
limb of the Sun, that being the time he eftimated the 
two limbs to be in contaCt. 
The internal contacts, we think, may be relied on j 
the external happening fooner than expeCted, occa- 
fioned a doubt at its appearance, which made the ex- 
aCt fecond of its appearance a little uncertain. 
Philadelphia, 
June 9, 1 769. 
Signed,, 
Owen Biddle. 
Copy taken in hafte, but the times examined by 
Owen Biddle. 
The 
