A choice collection of rare secrets and experiments in philosophy as also rare and unheard-of medicines, menstruums and alkahests : with the true secret of volatilizing the fixt salt of tartar / collected and experimented by the honourable and truly learned Sir Kenelm Digby, Kt., Chancellour to Her Majesty the Queen-Mother ; hitherto kept secret since his decease, but now published for the good and benefit of the publick by George Hartman.

A Process, how to make a most Excellent Oyl of Sulphur in abundance; sent also by the said Abbot Boucaud to Sir K.

TAke an Earthen Pan of Stone-ware, in the midst thereof lay a piece of Brick, upon which set an Earth•••• Poringer full of Sulphur grosly beaten; then put fair water into your Pan, but not so much as to touch the said Poringer: Then kindle the Sulphur, and cover it with a Bell, so that the Bell touch the water, and that the fumes may not come out, but may condense and run down into the water, which afterwards must be separa∣ted in B. with a moderate heat. To set the Sulphur on fire, you may put into it a square or round piece of Iron made red-hot in the fire.

Hartman.) In my Opinion, if the Bell touch the Water, and that it hath no hole at the top, so that the Sulphur have no Air, it will not burn; I judge the best way to be thus: Let the Poringer stand in the Water, but not so deep, as that the Water bear it up, and make it float; if it stands half, way in the Water, it will do, for the weight of the Sul∣phur will keep it down, and the heat of the

Poringer will heat the Water, and the Va∣pours and steams thereof will mix with the fumes of the Sulphur, and make them con∣dense the better, and so distill down together into the Water. The Bell should be such a one as is now in use, with a long neck, and a hole at the top, which should not touch the Water nor the Pan, but it should be suspended in such manner, that there be some distance between the bri•• of the Bell and the sides of the Pan.