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1. Take of an y one of the Ejsential Oyh, set down in the Catalogue, one ^ Mixtme ®f

part; ofthe CompoundSprit os Nitre two parts ;*(thesc may be Drachmi is ””

you please) and they will with great Celerity and a greac Noise produce a ActualHame, which lasts a very little while, but leaves an inlipid Caput Mortuum, '' f ' 101 '

as Light and Tastless as a Cobweb.

Nute i, This Experiment fhould be made under a Chimney, or any '•convenient Draught, that lb the Offensive Stearns may Evaporate.

2. A Gally-pot fpacious enough to hold 4 or 5 Ounces of Water, maybe a convenient Veffel for this Experiment, if you only use the fore-men-tion’d Proportion ; but if you please to use larger Quantities, then you muffenlarge the Veffel.

z. Vou muli put the OylmXo the Gally-pot first, and then pour the Spiriton the Oyl , because the Spirit being Heavier, does the bester paß throughthe Oyl, and make a more expeditious Mixture. This muff not be dropt ingradually, but convey’d in alcogether.

4. Hold not your Head too near the Gally-pot, lest the sudden Explosionof the Matter fhould strike up some of it in your Face.

5. The Compound Spirit will loose muchof its Vertue if kept too long.

3. Take of Sah Teter and Oyl of Vitriol equal parts, and Distil these out way orfrf .of a Retort in a good Sand Furnace , so that the Sand continue Red Hot t-> rm s »if Com-for some Hours; for the Tire cannot be too great: The Fumes will rise of a

very deep Red Colour, and will settle in the Receiver, in the form of a Li-quor, which must be carefully prescrved from the Air; this bcing the Spiritwith which all ovr Experiments were made, which are refered to in theCatalogue.

To make the common Spirit of Nitre, you need only to mix y or 6 timesas much Clay as you take of Nitre, and Distil them in a Retort, and you mayobtain a strong Spirit of Nitre this way, especially if you Dephlegm it, andReBify it to the liest advantage.

With this we have made an Experiment of Acctnston that socceed sometimes,but with great uncertainty ; but the first, which lcall the Compouud Spirit of -Nitre, is only to be relyed 011.

This Compound Spirit seems to be the Active Principle that stirs up theOily, or more Passive Particlcs to take Fire j which will more easily be agreedto, if we consider that our Compound Spirit of Nitre does not only consist ofall those Jgneetts Particlcs to be found in Common Spirit of Nitre, but that ithas also ali those Igneous Particles which Oyl of Vitriol contains in it, crowdedinto our Spirit ol Nitre made this way.

For further Illustration, let us consider, That Oyl oS Vitriol is a Creature ofthe Fire; That the Sulphur, which is plenti!ul in Vitriol, or in Copperas, isAccended , and afterwards Distilled over in the form of a Liquor, which is aLiquid fort of Fire as having rr.any Properties of it; If you put it to Waterit will make it BoylingHot; It Bums not only Linnen and Wollen, butWood to a Coal; and scarce spätes any thing.

Nitre, the other Ingredient of our Spirit, is very sosoeptible of Hame,which does also incorporate many Igneous and Corrosive Particles aster it has

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