of Heat and Cold.
15
The success of this Experiment upon a second trial serv'd to confirm it, which is the more strange, because I have found, that a small quantity of Oyl of Vitriol, not beforehand mingled with water, would produce a notable heat in its conflict with a small portion of just such Salt as I employed before (both the parcels having been, if I well remember, taken out of the same Glass.) And this heat did upon trial, made with the former Thermoscope, make the tincted Spirit ascend much further than the lately recited Experiment made it subside.
A
