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place was over, as foon as the houfe was taken up ; 
otherwife, no body could have been left on the floor. 
I have now given a very circumftantial account of 
this furious blah ; being perfuaded, that an attention 
to every particular in effects is generally neceflary to 
a difeovery of their caufe. It appears to me fo dif- 
ficult to afiign a caufe adequate to thefe effedts, to 
fhew by what means a fmall body of air could be put 
into a circular motion, fo exceflively rapid as this 
mult have been, that I dare not venture any con- 
jectures about it. It would be a great fatisfadtion to 
me, to know your fentiments, or thole of any other 
learned gentlemen of the Royal Society, upon this 
article. 
I beg leave to fubferibe myfelf, 
With the greatefl refpedt. 
Reverend Sir, 
Your mod obedient and 
mod humble fervant, 
John Winthrop. 
Cambridge, New England, 
30 July 1760. 
IV. A 
