C 793 Jt 
refriarfcable, I refer the Reafbn to the more piercing Ge- 
nius of thofe moft judicious Members of the Society : 
And it might perhaps be worthy theDifquifition of the 
moft Learned to give an Account of the various Altera- 
tions and fatal Effedts that the Air has on humane Bo- 
dies, efpecialiy when impregnated with a Marine Salt ;.. 
mere peculiarly when (uch an Air becomes ftagnant : 
This might perhaps make feveral beneficial Difcoveries, 
not only in relation to rhofe Diftempers in America^ but 
perhaps take in your Kentijh Agues, and many others re- 
markable enough in our own Nation. I lately was ma- 
king fome Qbfervations of this Nature on a Lady of a 
delicate Conftitution, who living in a clear Air, and re- 
moving towards the Sea-Coaft, was lamentably afflldted 
therewith, which both my felf and others attributed to 
this Cauie, (he having formerly upon her going to the 
fame been feized in the fame manner. But to return 
There is one thing more in reference to this very thing, 
very remarkable in Virginia, generally twice in the 
year, Spring and Fail, at certain Spring Tides, the mott 
of the Cattle will fet on gadding, and run, tho' it be 
twenty or thirty Miles, to*the River to drink the Salt 
Water, at which time there's fcarce any flopping of 
them; which the People know fo well, that- if about 
thofe times their Heards are ftray'd from their Plantati- 
ons, without more follicitation they go dire&iy to the 
Rivers to fetch them home again. As for the Waters in: 
the Springs in general, they are, I think, foraewhat more 
eager than thofe in England. In that I have obferved, 
they require fome quantity more of Mault to make 
ftrong Beer than our Engliih Waters, and will not bear 
Soap. I have try'd feveral by inlufing of Galls, and 
found little difference in. the Colours , turning much 
\Wiat the Colour of common Sack in Taverns. I tried 
two Wells at Col. B/Ws, by the Falls of fames Fiver, 
feveral Wells near James Tow^ fome Springs in the Ijfe-- 
