4 Vegetable Staticks. 



CHAP. I. • 



Experiments, Jhewing the quantities imbibed 

 and perjpired by Plants and Trees. 



Experiment I. 



JUL Y 3. 1724. in order to find out the 

 quantity imbibed and perfpired by the 

 Sun-flower, I took a garden-pot (Fig. 1.) 

 with a large Sun-flower, a, 3 feet~j--f high, 

 which was purpofely planted in it when 

 young; it was of the large annual kind. 



I covered the pot with a plate of thin 

 milled lead, and cemented all the joints fait, 

 fo as no vapour could pafs, but only air, thro* 

 a fmall glafs tube d, nine inches long, which 

 was fixed pufpofely near the Hem of the 

 plant, to make a free communication with 

 the outward air, and that under the leaden 

 plate. 



I cemented alfo another fhort glafs tube 

 g into the plate, two inches long, and one 

 inch in diameter. Thro* this tube I watered 

 the plant, and then flopped it up with a 

 cork y I flopped up alfo the holes /, /, at the 

 bottom of the pot with corks. 



I weighed 



