[ 29 ' ] 
Inch long, which has lain by me thefe ten Years* 
and having nothing at hand convenient for holding 
it, I roll’d it up in a fmall Piece of white Paper ; and 
applying it to the excited Tube, it immediately took 
Fire, emitting a conliderable Quantity of Flame and 
Smoke : After fome time I quench’d ir, by dipping 
it into Water, which was ready for that Purpofe * 
and taking it out again without flaying any longer 
than to be fatisfied it was not on Fire, I applied it 
as before, when it fuddenly took Fire, as at firft : 
This I repeated in the fame manner for fix or feven 
times with the like Effect ; tho’ the Phofphorus could 
not be drained of the Water, efpecially as the Paper 
about it was wet. 
The Room in which I made the Trial was not 
abfolutely dark, having a dull Fire (tho’ without any 
Candle): The Tube I ufe is about two Feet and 
a half long, the Diameter of the Bore nearly one 
Inch, the Thicknefs about one Eighth of an Inch, 
hermetically fealed at one End (which Sort are, by the 
way, moll convenient for rubbing) : The Phofpho- 
rus was held generally about five Inches from the 
Tube; but once or twice bringing it nearer, I could 
perceive a continued Ray of Light from the Tube to 
the Phofphorus. Some Occafions calling me away 
in the midft, I could not be more accurate ; but I 
would not omit to tell you one Obfervation I made, 
upon pretty fmartly exciting the Tube, that the Cor- 
rufcations of Light were larger, more fubftantial, and 
of a more regular Form than I had ever obferved 
them before, This happen’d, not when the Phofpho- 
rus was applied, but in the Intervals. Whether any 
of the Fumes of the Phofphorus , which remained in 
the 
