294 APPENDIX. 
diluted with Water, caufed a great Heat,- but 
no vifible Effervefcence or Fume. 
4. In thefe and the like Experiments I 
frequently made ufe of an inverted chymical 
Receiver inftead of the cylindrical Glafs, Ftg- 
54. which Receiver was fufpended by a Cord, 
which was braced round it : I firft poured 
the acid Spirit into the Bolthead or large Tube, 
and then put into the Top of the Bolthead 
an inverted Neck of a Flounce Flask which 
formed a little Tunnel, whofe lower Orifice 
being flightly flopped with a Cork or Plug of 
Gotten or Flax, I filled the Neck with the 
Powder, and at the fame time put into it a 
ftrong Piece of Wire, which was two or three 
Inches longer than the Neck ; then placing 
the Bolthead or large Tube under the invert- 
ed Receiver, I drew up the Water into the 
Receiver to a proper Height by means of a 
Syphon : Then with my Hand I raifed up the 
Bolthead or large Tube, fo as to make the 
Wire bear hard againfl the Top of the invert- 
ed Receiver, whereby the Cork being puflied 
out of the Neck of the Flask, the Powder fell 
down into the Spirit. 
5. But wiien the five Tubes abovem^^nti- 
oued were placed at the fame time under^e 
6 Receiver, 
