[ 9 ] 



any fuperfluous or noxious humour fe- 

 creted on the furface of animals or ve- 

 getables; and their influence will pro- 

 bably be found much greater than it is 

 at prefent, when focieties, fimilar to 

 thofe of Peterfburgh, Paris, London, 

 Leipfic, Gottingen, &c. vying with 

 each other in difcoveries relating to 

 ceconomy of nature, come to be efta- 

 blifhed in the feveral kingdoms and 

 principal cities of Europe. To arrive 

 at a perfecl: knowledge of this ceco- 

 nomy, every part 6f the produclions of 

 riature muft be accurately inveftigated, 

 and confequently the extenfive province 

 of infe£ts : for, notwithftanding their 

 great ufe in the ceconomy we have 

 been fpeaking of, they are oftentimes 

 extremely troubkfome and deftructive, 

 and with great difficulty got rid off; 

 but if we underftood how to apply 

 them properly, we might ufe them as 

 C we 



