20 get able Statich, 
hours day, was 1 1 ounces , its middle quan- 
tity 9 ounces, or 1 5 i cubick inches. 
The 1 5 t cubick inches perfpired, divid- 
ed by thefurface 1589 fquare inches, gives 
.the depth perfpired off the furface in 1 2 hours 
day, viz>. of an inch. 
, The area of a tran Tver fe cut of its{lem,^of 
an inch fquare, whence the lap’s velocity 
here, will be to its velocity on the furface 
of the leaves as 1589 x 4= 6356 : i. 
Experiment V. 
From to Aug, 25. I weighed for 
10 feverai mornings and evenings a very 
thriving Limon-treey which grew in a gar- 
den pot, and was covered as above : Its great- 
eft perfpiration in 1 2 hours day was 8 ounces, 
its middle perfpiration 6 ounces, equal to 
1 04 cubick inches. In the night it perfpired 
fometimes half an ounce , fometimes no- 
thing, and fometimes increafed i or 2 oun- 
ces in weight, by large dew or rain. 
The lurface of its leaves was 2557 
fquare inches, or 17 fquare feet 59 
fquare inches % dividing then the loj cabick 
inches perfpired by this furface, gives the 
4 
