Feb. 7 6 1 
Mar. 14 71 . 
19 8 
24 8 . 
^ 7 5° • . 5 44 North 
tf 1 1 49 
b 15 38 
19 2 
The wide difagreement there is between the ma- 
nufcript account of this comet, and its places here 
computed, mufl very much lelfen, if it does not 
quite overbalance, the force of the arguments brought 
by Dr. Halley to prove the identity of thefe two 
comets. 
Indeed if this comet had been the fame with that 
of 1680, it could not have come to the beginning of 
Cancer, without a change in the place of the perihe- 
lion too great to be eafily admitted 5 nor could it 
have left the order of the figns without a change in 
the elements flill greater. I am, 
S I R, 
Your obliged, and 
moft obedient fervant, 
Richard Durithorne, 
XLIV. 
