xcviii TO THE READER 



traduce and expose useful things ; because to arrive at them, 

 they converse with mean Experiments : But those who despise 

 to be employ d in ordinary and common matters^ never arrive to 

 solid Perfection in Experimental Knowledge. 



The changes and Alterations in the several Chapters and 

 Parts thoughout this Discourse^ with the Additions and Im- 

 provements^ have often oblig'd me to alter the ^Method, and 

 indeed to make it almost a New 



. Evelyn. 



