( 184 ) 
.move the mofl: inveterate Cafes. I am with all Re* 
fped. Sir, 
Tour moj: obedient and humble Servant^ 
^ Tho. Shaw. 
' - . , ■ ■ - 
IL A brief Account of fome of the EjfeSls and 
properties of DampSy in a ^Letter to William 
Rutty, M. T>. S^.Secr. . from Mr. Ifaac 
Greenwood, Profeffor of Mathematic^ at 
Cambridge, New England. 
S I Ry , ' \ 
Y our obliging Letter I received not till 
about Half a Year after the Date thereof j and 
have been lead on to fo long and criminal a Delay 
of iny x\nfwer, in Hopes of procuring fomething 
that might be worthy of your Notice. 
I, have now fent you indofed, a brief Account of 
two InRances of the deadly Effed of vitiated Air 
upon Animal Life. 
If fuch Experiments as I have made on the Damp 
therein mentioned, be of any Importance in the Dis- 
covery of the true Caufe of this wonderful PhienomP-- 
non., I fhall have attained my End. I take the Liber- 
ty to write my felf, 
Tour moj obedient humble Servant., 
Cambridge, New England, 
Howard Colledge, May 
10, 1729. 
Ifaac Greenwood. 
Mr. 
