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Vegetable Staitch. y 



I weighed this pot and plant morning 

 and evening, for fifteen feveral days, from 

 July 3. to Aug. S. after which I cut off the 

 plant clofe to the leaden plate , and then 

 covered the flump well with cement; and 

 upon weighing found there pcrfpired thro* 

 the unglazed porous pot two ounces every 

 twelve hours day, which being allowed in 

 the daily weighing of the plant and pot, I 

 found the grcateft perfpiration of twelve 

 hours in a very warm dry day, to be one 

 pound fourteen ounces 5 the middle rate of 

 perfpiration one pound four ounces. The 

 perfpiration of a dry warm night, without 

 any fenfible dew, was about three ounces; 

 but when any fenfible, tho* fmall dew, then 

 the perfpiration was nothing ; and when a 

 large dew, or fome little rain in the night, 

 the plant and pot was increafed in weight 

 two or three ounces. N. B. The weights I 

 made ufe of were Avoirdupoife weights. 



I cut off all the leaves of this plant, and 

 laid them in five feveral parcels, according 

 to their feveral fizes, and then mcafurcd 

 the furface of a leaf of each parcel, by lay- 

 ing over it a large lattice made with threads, 

 in which the little fquares were £ of an inch 



£ 3 each 5 





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