*5S 



was abforbed as ufual. I then took a quantity of 

 ftrong artificial Pyrmont water, and, putting it into 

 a thin glafs phial, I fet it in a pot that was filled 

 with fnow and fait. This mixture inftantly freezing 

 the water that was contiguous to the fides of the 

 glafs, the air was difcharged plentifully, (o that I 

 catched a confiderable quantity, in a bladder tied to 

 the mouth of the phial. I alfo took two quantities 

 of the fame Pyrmont water, and placed one of 

 them where it might freeze, keeping the other in 

 a cold place, but where it would not freeze. This 

 retained its acidulous tafle, though the phial which, 

 contained it was not corked •, whereas the other, 

 being brought into the fame place, where the ice 

 # melted very flowly, had at the fame time the taffce of 

 common water only. That quantity of water 

 which had been frozen by the mixture of fnow and 

 fait, was almoft as much like fnow as ice, fuch a 

 quantity of air bubbles were contained in it, by 

 which it was prodigioully increafed in bulk. 



The preflure of the atmofphere aflifts very con« 

 fiderably in keeping fixed air confined in water j for 

 in an exhaufted receiver, Pyrmont water will abfo- 

 lutely boil, by the copious discharge of it's air. This 

 is alfo the reafon why beer and ale froth fo much in 

 'vacuo. I do not doubt, therefore, but that, by the 

 help of a condenling engine, water might be much 

 more highly impregnated with the virtues of the 

 Pyrmont fpring, and it would not be difficult to 

 contrive a method of doing it. 



The manner in which I made feveral experiments 

 to afcertain the abforption of fixed air by different 

 fluid fubflances was to put the liquid into a dim', 



X a and 



