To the extent possible under law, the Text Creation Partnership has waived all copyright and related or neighboring rights to this keyboarded and encoded edition of the work described above, according to the terms of the CC0 1.0 Public Domain Dedication (http://creativecommons.org/publicdomain/zero/1.0/). This waiver does not extend to any page images or other supplementary files associated with this work, which may be protected by copyright or other license restrictions. Please go to http://www.textcreationpartnership.org/ for more information.
[Section. 1] BECAUSE all Flints have Sulphur in them (yet some more than others,) if you will try them, and make a proof upon them, Weigh two centners of the Flinty raw Oar, and put it in a Proof-Test, and roast it dead (as I have men∣tion'd
before off the Copper-Oars) let it be cold and weigh such roasted Oar again, now so much as these two Centners have lost, so much they have had of Sul∣phur, for the Sulphur goes in the fire and in the air, this proof is easy, yet it is not manifested what Sulphur it doth yield, but that you may have the same Sulphur ap∣parently; Beat the flint small, to the bigness of an Hazel [Section. 2] nut, put it in a great Retort made of the best Potters-Clay, that the neck of the Retort may hang in water, make a wood-fire about it, then the Sulphur will ascend from the flint, and you will find most part before in the Receiver of the Retort, fine and yellow, but 'tis yet un∣washed, and must be cleansed in a strong fire.
[ 3] How, this is further to be done, is to be seen in great iron Retorts when the Sulphur becomes red. But this is to inform the Reader, That all flints burnt in iron Re∣torts to Sulphur do yield red Sulphur, which Painters use to highten yellow or orange Colours, but the manner of making Sulphur, with great Retorts do not appertain to this Treatise, therefore I have named it only for the Proof-sake.
Retorts.