or T H x 



O R I G I N 



o r 



C H E M I S T R Y.* 



In art'ibut etfcifnfiif, tanquam in met alii fodlnis, omnia novit op 

 ril/ut tt ullcrtonlut progrrJJiLus circurnjlrepcrc dclcnt. 



BACO DE VERVLAMIO. 



5. I. Of the Slow Progrcfs of Natural Pbi 



J\ S the qualities of bodies can never be known 

 by rcafbning a priori^ it is not to be wondered, 

 that the progrcfs of Natural Philofophy unto its . 

 prefcnt height fliould have been fo flow, when 

 we confidcr, that every thing mud be atten- * 

 lively obfcrvcd, compared, and put to the tcil ; 

 of experiment. The fallibility of our fenfcs, 

 too, is one great caufe of delay: For, whenever 

 A fubftanccs 



* T'aia difTcrtation was publicly read at Upfal, ia the 

 IIJJ, 4ih Jucc 2779. 



