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at the end of the firit year, it could not, in the lead:, 
be perceived to dfine, when taken from the drongeft 
day-light, and carried into a dark room. It was alfo 
obferved to lofe its whitenefs by degrees, and to 
become of a very dark colour, efpecially on that fide 
of it next to the glafs. Some of the phofphorus 
which was made to dick to the infide of a glafs ball 
hermetically fealed, by means of common fpirit of 
wine, was found after one year to be a little im- 
paired ; but fome made to dick by means of an 
astherial fpirit, was found not to be impaired at all. 
According to Dodtor Nicholas Lemery (in his 
Courfe of chymidry, eleventh edition) the expodng 
the Bolognian done to the Sun wears it out. But by 
the fird experiment it appears, that a phofphorus of 
the fame kind was not hurt by the Sun in twelve 
months. Water, indeed, in the fecond experiment, 
was found in that time to dedroy it. Therefore it is 
probable, that what the Do&or imputed to the light 
of the Sun, was caufed by the moidure of the air. 
Experiment III. 
I mixed a fmall quantity of the phofphorus with a 
condderable quantity of fpirit of wine in one glafs ball, 
and with aether in another, and fealed them hermeti- 
cally. When the balls were diook, each of the 
fluids appeared like milk ; but the phofphorus would 
foon fubiide when the balls were at red, and leave the 
fpirit of wine and aether quite clear. After fome 
months, the fpirit of wine was found to be tinged with 
yellow ; but the aether, to this time, remains un- 
altered. By fhaking the balls while they are expofed 
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