f 340 ] 
to the light, the whole of the fluid in each, will 
appear luminous when carried into a dark room. 
The aether gives as much light now, as it did at firft; 
but the fpirit of wine a little lefs. 
Experiment IV. 
I expofed the dry phofphorus, in one of the glafs 
balls mentioned in the firft experiment, to the light of 
the day, by holding it on the outflde of a North 
window about half a minute ; after which it was kept 
in darknefs for two days and a half, and was then 
found tofhine, by putting the glafs ball that contained 
it into a bafon of boiling water. On the morrow it 
was expofed to the light again ; and after it had been 
kept four days and a half in the dark, it gave light 
when put into boiling water, though not lb much 
as before. In fummer, I find, it will not give any 
light by the heat of boiling water after keeping it 
fifteen days ; but in winter, it will afford a little, after 
keeping it a month. 
Experiment V. 
The phofphorus in each of the two glafs balls men- 
tioned in the fir ft experiment was illuminated at thefame 
time and to the fame degree, and carried into a dark 
room. One of the balls was immediately put into a 
bafon of boiling water, and thereupon the phofphorus 
in it became much brighter than that in the other, 
and continued fo for a Ihort time, but parted with its 
light fo faft, that in lefs than ten minutes it was quite 
dark. The other phofphorus ftili gave a confiderable 
degree 
