of WA TER by HZA T, 389 



Experiment II. 



I FILLED the fame jar with water of temperature 53° ; and 

 that I might obferve the phenomena of cooling, I placed it in 

 the axis of a much larger cylindrical veffel, nearly full of water, 

 of temperature 41**, and, by an earthen-ware fupport, raifed it 

 about three inches from the bottom, taking care that the water 

 fhould be on the fame level in both veflels. As foon as I had 

 adjufted the two thermometers, as in the former experiment, I 

 obferved that the top of the fluid was ftill at Si°i but the bot- 

 tom had fallen to 49°. 



Top. Bottom. 



In 9 minutes, 52° - 45 



— IS 52 - 44 



Now, to accelerate the cooling, I withdrew by a fyphon the wa- 

 ter from the large cylinder, and fupplied its place by ice-cold 

 water, mixed with fragments of ice, which by repeated cautious 

 agitation was kept uniformly at the temperature of 32°. 



In 23 minutes, 48 ° - 42+ 



— 38 44 - 40 



— 43 42 - 40 



' — 46 — 40 - 40 



— 52 2>^ - 40 



— 58 ZS— - 39 



— 65 34 - 37 



— 75 34 - 3^ 



- 103 34 - 34 



Tbis- 



