461 



ELECTRICITY. 



Electricity. 



In making another experiment with the same cruci- precaution to repeat the experiments under the very 

 ble, Saussure obtajncd very ilifli-rent reMill-s as will be same circumstances. ^ 



Men from the following Table, although he took every J"~~ 



experi- 



TABLE II. Shewing the Electricity produced by the Evaporation of Water placed on a heated Crucible ments% 



of Iron. 



The following experiments were made with a cruci- 

 ble of Copper, three inches and three lines in diameter 



at top, and two inches in diameter at the bottom, three 

 inches high, four lines thick, and weighing 57 ounces. 



TABLE III. Shoeing the Electricity produced by the Evaporation of Water placed on a heated Crucible 



of Copper. 



In the preceding Table, the electricity is still always 

 positive, and is strongest when the time of evaporation is 

 a mean between the shortest and longesttimei. When the 

 copper was very much heated, the water, where it came 

 in contact with the metal, was convex like a surface of 



mercury or glass. Sometimes the water appeared ira- 

 moveable ; at other times it turned horizontally upon 

 itself with great velocity; and at other times threw 

 from some of its points a little jet accompanied with a 

 hissing noise, as if that point alone had been touched by 

 3 





