Take fome ounces of ftroog Oyl 

 of Vitriol, andfhakingit with three 

 or four times its weight of common 

 water, though both the liquors were 

 cold when they were put together, 

 yet their mixture will in a trice grow 

 intenfely hot , and continue coofi- 

 derably fo for a good while. In this 

 cafe it cannot probably be pretend- 

 ed by the Chymifts, that the Heat 

 arifes from the conflift of the Acid 

 and Alcalizate Salts abounding in the 

 two liquors, fince the common wa- 

 ter is fuppos'd an elementary body 

 devoid of all (alts 5 and at leaft, be- 

 ing an infipid liquor , 'twill fcarce be 

 thought to have Alcali enough to 

 produce by its Rea&ion fo intenfe a 

 Hear. That the Heat emergent up- 

 on fuch a mixture may be very great 5 

 when the Quantities of the mingled 

 liquors are confiderably fo^ may be 

 eafily concluded from one of my 

 Memorials , wherein I find that no 

 more than two ounces of Oyl of 

 Vitriol being poured (but not all at 

 once) into four ounces onely of di- 

 alled 



