
368 » Mr. WEDGwoon’s Method of conneéting % 
sais the muffle appeared’ of a low red ‘heat, said % 3 
Heel to come fully within the province of my thermometer’, | 
it was drawn forward, towards the door of the oven ; and its 
own door being then nimbly opened by an affittant, I imme- 
diately pufhed the filver piece as far as it would go. But as the - 
divifion which it went to could not be diftinguifhed in that: 
ignited ftate, the mufHe was lifted out, by means of an iron’ 
rod pafied through two rings made for that purpofe, with care’ 
to keep it fteady, and avoid any fhake that might pei the 
diplacing of the filver piece. . 
_ When grown fufficiently cold to be stated I ised sd 
abit. of expanfion which the filver piece ftood at, and the 
degree of heat fhewn by the thermometer pieces meafured in 
their own gage; then returned the whole into the oven as be-= 
fore, and repeated the operation with a ftronger heat, to obtain 
another point of correfpondence on the two {eales. ~ ve 
The firft was at 2° of my thermometer, which coincided 
with 66° of the intermediate one; and as each of thefe laf 
has been before found to contain 20 of FAHRENHEIT’s, the’ 
66 will contain +1320; to which add 50, the degree of his 
{cale to which the o of the. intermediate thermometer was ad- 
jufted, and the fum, 1370, will be the degree of FAHREN- 
HEIT’s correfponding to my 2°3. t 
The fecond point of coincidence was at 6° of mine, and 
92° of the intermediate; which 92 being, according to the’ 
above proportion, equivalent to 1840 of FaAuRENHEIT, add 50 © 
as before to this number, and my 6°: is found to fall upon thet 
18g9o0th degree of FAHRENHEIT. | 
‘It appears from hence, that.an interval of 4 degrees upon mine ~ 
is equivalent to.an interval of 520° upon his; confequently 1 of) 
mine to 130 degrees of his; and that the o of mine correfponds 
to 

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ee 
