20 PASTEUR 



to work as hard as ever. Work, work, work 

 was destined to be the maxim of his whole ex- 

 istence. 



While a student in the Ecole Normale Louis 

 Pasteur continued to give lessons at the Pen- 

 sion Barbet, in recognition of the generous 

 treatment he had received at the hands of its 

 worthy master ; he also continued to attend the 

 lectures of Dumas and followed him with ab- 

 sorbed attention, and to his great joy he was 

 allowed to enter the laboratory of his instruc- 

 tor Barruel, who gave him much practical ad- 

 vice. From this time forward the general de- 

 velopment of Louis Pasteur seems to have been 

 completed, his genius was revealed under a 

 double character which was destined to assure 

 the immortality of his works : he had an unlim- 

 ited audacity of ideas, his intuitive conceptions 

 soared to the outermost boundaries of human 

 thought, and, on the other hand, he bound him- 

 self down, in his experiments, to an extremely 

 rigorous method that refused to take count of 

 any fact that had not been strictly verified. 



