ao Vegetable Staticks. 



The greatefr, quantity it perfpired in iz 

 hours day, was 1 1 ounces, its middle quan- 

 tity 9 ounces, or 15 -f- cubick inches. 



The 15- cubick inches perfpired, divided 

 by the furface 1589 fquare inches, gives the 

 depth perfpired off the furface in 12 hours 

 day, viz. T ~r of an inch. 



The area of a tranfverfe cut of its ftem, £ of 

 an inch fquare, whence the fap's velocity 

 here, will be to its velocity on the furface 

 of the leaves, as 1589 x 4 = 6356 : 1. 



Experiment V. 



From J 'uly 28. to Aug. 25. I weighed for 

 10 feveral mornings and evenings a very 

 thriving Limon-tree, which grew in a gar- 

 den pot, and was covered as above: Its great- 

 eft perfpiration in 12 hours day was 8 ounces, 

 its middle perfpiration 6 ounces, equal to 

 ic-| cubick inches. In the night it perfpired 

 fometimes half an ounce, fometimes nothing, 

 and fometimes increafed 1 or 2 ounces in 

 weight, by large dew or rain. 



The furface of its leaves was 2557 

 fquare inches; or 17 fquare feet -(- 109 

 fquare inches; diyiding then the 10 cubick 

 inches perfpired by this furface, gives the 



depth 



