D'/jlafcS occafioneJ bj- Infects In Siveden, o^c. ■ 230 



On this account, it is very proper for being applied on arti- 

 cles of mahogany. It renders the foft kinds of wood much 

 harder at the furface. 



This varnifli ufed in this manner would not be expenfive, 

 as eight ounces of it is fufficient for a common card-table. 

 Should the table be fcratched, the injured part may be eafiiy 

 repaired by a new coating of varnifli ; and if it be new var- 

 nirtied every four or five years, it will always retain a beau- 

 tiful and bright appearance. 



Tables and other fiat articles which require a great deal 

 of poHfliing, when the flain and linfeed oil have been ap- 

 plied, may be rubbed with a piece of pumice flone before 

 they are done over with the varnifli. This pumice fione 

 muft be made flat on one fide, and muft be free from fand, 

 fo as not to fcratch the wood. As the fofter kinds of wood 

 fwell up, for the moft part, when the fiain is applied, and 

 lofe their fmoothncfs, rubbing them in the above manner 

 ivith pumice ilone is the more necedarv. 



yill. Comparative Vieiv offome dajt^erojis Difcafcs, fuppofed. 

 to be occaji'jiu'd bj InfeSls, which prevail in Siueden, Ricf' 

 Jia, Siberia, and the adjacent Countries, 



[Concluded fioni Page 144.] 



T 



-L HE late Dr. J.J. Lerche, of Peter(burgh, communi- 

 cated to me the following account of fome pedilential dif- 

 eafes which manifell: themfclves in the marfliy diftriSs 

 around that city and in oilier places during dry fummcrs, 

 and which appear to me to be of the fame nature as the 

 Siberian difeafe before mentioned. But that I may not be 

 accufed of endeavouring to pervert faiSts for the purpofe of 

 fupporting my own opinions, I fliall here give the author's 

 own words : 



" In the year 1756, a very hot dry fummer, unhealthful 

 for men as well as cattle, took place after a very unhealthful 

 winter. The difeafe which then prevailed continued till the 

 harvcfl:, and extended on one fide to Mofcow, a:nd on the 

 other to Livonia and through Finland. As foou as the fenate 

 were informed of it, Condoide,-phyfician to the court, wa3 



ordered 



