58 THE CONTAGIOUS TYPHUS 



of latent incubation ; and that the same gases 

 being mixed with their drink, have also 

 propagated the contagion. 



That frictions, with the hands impregnated 

 with virus, having been made over the skin, 

 did not produce any ill effects. 



That some oxen which had been designedly 

 placed for a few hours among sick animals, 

 have afterwards been seized with the dis- 

 temper. 



That a calf which had been placed in 

 a stall containing some oxen grievously 

 affected, but which calf had a basket beneath 

 its nose filled with aromatic herbs, withstood 

 the contagion. 



That cowsheds which had been partially 

 cleansed and fumigated, transmitted the disease 

 to other cattle, even several months after they 

 had been vacated. 



Finally, he mentions the experiments of 

 inoculation made by Layard in England, but 

 not understanding their aim and capacity, he 

 adds, that inoculation does not seem to -him 

 of any use, since the inoculated animals all 

 died. Yet he quotes the encouraging results 

 obtained by Camper in Holland, who, out of 



