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the Room, might contribute hereto, I cannot tell, tho’ 
it is not very likely. 1 (hall attempt below togive you, 
as well as I can, the Form and Size of the Rays of Light, 
as they appeared immediately after my withdrawing my 
Hand, without applying my Finger, as is ufualiy done 
to produce the Snapping of the Effluvia. Tho’ I 
never made many Trials with Fhojphorus , yet as I 
am not infenfible, that fome folid Kinds of it will be 
inflamed by the mere Action of the Air upon it, 
when it is taken out of the Water in which it is 
ufualiy kept 5 I was therefore minded to try whether 
the Air would have that EfFed upon mine, and ac- 
cordingly took it out of the Water, with a Forceps , 
and laid it down on a Shelf, fo as nothing touch’d 
it but the Inftrument which held it, but I could not 
perceive the lead Glimmering of Light, tho’ the Place 
was fufhciently dark, after it had lain there for the 
Space of half an Hour, which I thought long enough 
to fatisfy me, that it was not kindled by the Adion 
of the Air upon it in the above-mentioned Experi- 
ment. 
If you have known this Trial to have been made 
by any one before, you will cafl: this into the Fire j 
and however believe, that I am, with very great Sin- 
cerity, 
\ Dear Sir , 
lour mo ft affectionate^ 
and obliged humble Servant , 
H. Miles. 
See 
