Chap. 32.] Caution in tie Ufe of Copper Veffeh. 203 



off, and the copper becoming expofed, to make fa 

 as thick as poifible, and to ufe tin nearly pure. 



A very excellent method of tinning, and one much 

 practifed in England, is, to make ufe of pure tin, and 

 hammer it on the copper. It feems probable, how- 

 ever, that when copper vefifels are kept well fcoured, 

 that no danger will arife from them in the dreffing.of 

 animal food, or even of vegetable aliments, unlefs fufc 

 fered to remain in the veffels when cold. 



