190 THE LIFE OF PASTE I'R 



sixty dogs at Villeneuve l'Etang, forty at Rollin, ten at Fregis', 

 fifteen at Bourrel's, and I deplore having no more kennels at 

 my disposal. 



' What do you say of the Rue Pasteur in the large city of 

 Lille? The news has given me very great pleasure." 



What Pasteur briefly called " Rollin " in this letter was the 

 former Lycte Rollin, the old buildings of which had been 

 transformed into outhouses for his laboratory. Large cages 

 had been set up in the old courtyard, and the place was like a 

 farm, with its population of hens, rabbits, and guinea-pigs. 



Two series of experiments were being carried out on those 

 126 dogs. The first consisted in making dogs refractory to 

 rabies by preventive inoculations ; the second in preventing 

 the onset of rabies in dogs bitten or subjected to inoculation. 



