MICROBIOLOGICAL TECHISIQUES 



"Perfect as is the wing of a bird, it never could raise 

 the bird up without resting on air. Facts are the 

 air of a scientist. Without them you never can fly. 

 Without them your 'theories' are vain efforts. But 

 learning, experimenting, observing, try not to stay 

 on the surface of the facts. Do not become the 

 archivists of facts. Try to penetrate to the secret of 

 their occurrence, persistently search for the laws 

 which govern them." 



Pavlov 

 in Bequest of Pavlov to the Academic Youth of His 

 Country, Science 83: 3G9 (193G). 



