(as ) 



On WATER. 



Obfervatio?is on Water ^ extracted from Dr 

 Rotterdam's Fhilofophical Enquiry, &c. 



IT is a long eflabliflied obfervation, that the 

 bed waters boil and cool again the fooneft ;< 

 and that they evaporate in the leaft time, and with 

 the leafl degree of heat. 



A well known mark of the purity of water is its 

 foftnefs. This quality is difcoverable by the 

 touch, if we only walh our hands in it : and the 

 diftinclion between hard and foft water generally 

 arifes from its difficult or eafy union with oily 

 fubftancejo 



Soft 



•/—J 



