( 101 ) 
But left we fliould incur the Cenfure of thcfc that 
may attempt the making this Experiment, for want of 
fetting down fuch particular Dire&ions as are neceflary 
to make this nice and curious Experiment, fuccefsful, I 
intend to be very plain and diftinft both in the way 
and Method of preparing the feveral Spirits and Oyls 
that are ufed about ir^ and alfo as to the manner of 
mixing thera. 
1. This Experiment (hould be made under a Chim- 
ney, or any convenient Draught, that fo the offenfive 
fleams may evaporate. 
2. A Gaily- Pot, fpacious enough to hold four or five 
Ounces of Water, may be a convenient VelTel for this 
Experiment, if you only ufe the forementioned Pro- 
portioji ; but if you pleafe to ufe larger quantities, then 
you muft enlarge the Veflel. 
3. You muft put the Oyl into the Gally-Pot firft , 
and then pour the Spirit on the Oyl, becaufe the Spirit 
being heavier, dees the better paft through the Oyl , 
and make a more Expeditious Mixture. This muft not 
be dropt in gradually, but conveyed in altogether. 
4. Hold not your Head too near the Gally-Pot, left 
the fadden Explofion of the Matter ftiould ftrike up 
(bme of it into your Face. 
J. The Compound Spirit will IoCq much of its Ver- 
tue if kept too long. 
The way of Preparing the Spirits for this Experiment. 
Take of Salt-Peter and Oyl of Vitriol equal parts, 
and Diftil thefe out of a Retort in a good Sand Fur- 
nace, fo that the Sand continue red-hot for fome hours, 
for the Fire cannot be too great ; the Fumes will rife of 
a very deep red colour, and will fettle in the Receiver, 
in the form of a Liquor, which muft be carefully prefer- 
ved from the Air ; this being the Spirit with which all 
our 
