I o l^e get able Statkksi 
The furface of fuch human body is 15 
fquare feet, or 2160 fquare inches. 
The furfacc of the Sun-flower is 5616 
fquare inches, its furface is to the furface 
of a human body as 26 : 10. 
The quantity perfpir*d by a man in twen- 
ty four hours is 3 1 ounces, as Dr. Keill found, 
*vide Medicina Statica Britannica, 14. 
The quantity perfpired by the plant, in the 
fame time, is 22 ounces, allowing two ounces 
for the perfpiration of the beginning, and 
ending of the night in July, viz. after even- 
ing and before morning weighing, juft be- 
fore and after night. 
So the perfpiration of a man to the Sun- 
flower is as 14 1 : loo. 
Abating the fix ounces of the thirty one 
ounces, to be carried oft' by refpiration from 
the lungs in the twenty four hours 5 (which 
I have found by certain experiment to be fo 
much if not more) the twenty five ounces 
multiplied by 437 -j- v* number of grains 
in an ounce Avoirdupois^ the produd is 
1 09 3 7r grains 3 which divided by 254, the 
number of grains in a cubick inch of water 
gives 43 cubick inches perfpired by a man: 
Which divided by the furface of his body. 
