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On the top of the tube K is cemented, for ornament, 
a brafs feril, with a head fcrewed on it, which has a 
fmall air hole thro’ its fide at a. The wire b is a frnall 
round fpring, that embraces the tube K fo as to flay 
wherever it is placed. The weight M is to keep 
ftrait whatever may be fufpended in the tube A B. 
on the hook I. Air muft be blown thro’ the tube 
K into the tube A B, ’till enough is intruded to raife, 
by its elaftic force, a column of the coloured water, 
in the tube K up to c, or thereabouts ; and then, 
the gage wire b being flipt down to the top of the 
column, the thermometer is ready for ufe. 
EXP. VII. 
I fet the thermometer on an ele&iic ftand, with 
the chain N fixed to the prime conductor, and kept 
it well eleCtrifed a confiderable time ; but this produced 
no fenfible efteCt. Which fliews, that the electric 
fire, when in a ftate of reft, has no more heat than 
the air and other matter wherein it refides. 
EXP. VIII. 
When the wires F and G are in contact, a large 
charge of ele&ricity fent thro’ them, even that of 
my cafe of five and thirty bottles, containing above 
thirty fquare feet of coated glafs, will produce no 
rarefaction of the air included in the tube A B. Which 
fhews, that the wires are not heated by the fires pafling 
thro’ them. 
EXP. IX. 
When the wires are about two inches apart, the 
charge of a three pint bottle, darting from one to 
the 
