The works of the Honourable Robert Boyle, Esq., epitomiz'd by Richard Boulton ... ; illustrated with copper plates.

EXPERIMENT II.

A larger piece of Iron than that formerly mention'd, being made use of, and convey'd in∣to a Receiver, a good quantity of Sulphur was let down upon it, which flamed considerably, and continued not only till the Receiver was exhausted, but a little after, and till it seemed to be extinguished for want of fuel.

In trying of which Experiments, the follow∣ing particulars are to be observed. First, that the Iron is placed on a Pedastal of Tobacco-pipe-clay not too near the Glass lest it should break it. Secondly, upon the concave Surface of the Iron, we placed a Convex-shell which was shaped like a flattish bottom, to keep the Ha•…•…e from having too large a Surface, and con∣sequently from consuming too fast. Thirdly, it will be convenient, for the more commodious

discerning of the Phaenomena of this Experi∣ment to try it in a dark place. And fourthly, it is convenient to advertise that the Sulphur frequently so obscures the Glass with its fumes, which partly stick to it, that sometimes it is very difficult to discern what happens with∣in the Glass. Fifthly, it is requisite the Heat of the Iron should be considerable, that the Flame of the Sulphur may be more lasting; the flaming of it depending on the Heat of the Iron, and not the force of its own Flame.