[ m ] 
the Experiment fo as to deceive fuch as were not very 
long-lighted s but Imuft confefs I have found it very 
hard to deceive thofe who fee at a great Diftance i 
tho’ they would all be deceiv’d, if the Diftances were 
of 300 or 600 Foot. Now in the Cafe of the Moon, 
the Deceit is help’d, becaufe the Vapours, thro’ which 
we fee it when low, take away of its Brightnefs, and 
therefore have the fame Effcd as would (or does) hap- 
pen in the Experiment, when the Light of the Ball op 
(trikes the Eye no (Longer than the Light of the Ball 
CD. 
VII. A Letter from Jofeph Atwell, 2). D. 
F. R. S. and ^Principal of Exeter College, 
Oxford, to Dr. Mortimer, R. S. Seer, con- 
taining fome Obfervations on a Man and 
Woman bit by Vipers. 
Exeter College , Oxford, July 24 , 1734 . 
SIR, 
T H E Man who was lately bitten by a Viper in the 
Prefence of yourfelf and feveral Members of 
the Royal Society, having been recommended to fome 
in this Place by Dr. Oliver of the Bath, I imagin'd 
that Sir Hans Shane and you will be pleafed with an 
Account of fuch Experiments as have been made here. , 
July 3d, the Man was bit in the Prefence of feveral 
befides myfelf, in the public Hall of this College. He 
received two Punctures in the Wrift, a little above the 
Thumb : The Blood iflued, and more Venom lay up- 
v _ 
