THE 



HISTORY 



O F 



CHEMISTRY, 



During the Obfcurc or Middle Age, from the 

 Seventh to the Seventeenth Century.* 



.\iftimarf vfortct naturam inu.'ta ct varia a rebut ipfn 



tt coaSam ffff i rat ion fm vtro i J, qua ab ilia Jill mandala et 

 traJita futrant) bojltriut aJcunttiora ft pditiora reJJiJffi, ft 

 aJJiJiJJi- t in nonnult'u citius t in aliit tarditis. 



LA CRT i us. 



5- i. General Idea of this Period. 



T 



MLS period may be reckoned from the de- 

 ilrudlion of the Alexandrian library by the A- 

 nibs about tlie middle of the fcvcnth century, 

 unto the firil inilitution of fcicntitic focicticr, a 

 little beyond the middle of the fevontccnth cen- 

 tury; 



* This Diflcrtation was publicly delivered in the 

 Hal], on the ntliof June, 1782. 



