iSS Inoculation for the Vaccine and the Plagiie, ^c, 



made a journey to the summit of the peak in the r»ionth of 

 August. We sailed from Fahnouth on the 5th of October 

 and arrived here a few days ago. In fmir days at furthest 

 we shall proceed to Rio de Jancrio^ in Brazil^ from which I 

 will write to you again. 



INOCULATION FOR TlHE VACCINE AND TH£ PLAGUE. 



Extract of a Lctttr from Dr. De Carko, of Vienna, to e. 

 Phi/sician in London. 



Dr. Valli who inoculated himself with the plague, in 

 order to try whether the vaccine is a preventative of that 

 disease, has, as appears, at length taken the plague, but it 

 is expected he will reco\'er. 



The question relating to dogs has net been resolved in a 



manner favourable to the assertion of Dr. , but as it 



does not affect the principal point of the doctrin; of the 

 vaccine inoculation it is of little importanccj and the doctor 

 has written to me that he has not been fortunate in his zoo- 

 nomical researches. 



The question relative to the clavelce is no\V quite re- 

 ^olved, the cow -pock docs not preserve sheep from future 

 infection, as the inoculated small-pox preserves men from 

 future variolic mfcction. The practice of clavelisatlon is 

 now extending very widely. Some assert that tlicy Iiavc 

 produced the cow-pock pustule on sheep, but hitherto no 

 experiments have proved that it is a preventative against 

 the clavelee. The celebrated and ingenious Dr. Sacco has 

 produced the coW-pock on most domestic animals, among 

 others sheep, and reproduced the disease in men and ani - 

 mals. Dr. Sacco has had the same success with equine as 

 with vaccine matter. 1 have no knowledge of the experi- 

 ment made in Ukraine which you mention. 1 imagine the 

 journalist alluded to has mistaken clavelisatlon for vacci- 

 nation. 



PALLADIUr^t. 



SIR, To Mr. Tilloch. 



As it is said in one of your Magazines that the hew metal 

 I have called palladium is not a new noble metal, as I have 

 said, but an imposition, and a compound of platina and quick- 

 lilver, I hope you will do me justice in your next; and tell 

 your readers I promise a reward of twenty pounds to any 

 one that can make only twenty grains of real palladium} 

 and that the money is already in Mr. Forster's hands, and 

 that I have begged Mr. Nicholson will name three proper 

 ,«heuucal gentlemen, as umpires. P- 



