by the Warburg apparatus. This 

 easures the respiration of bacteria 

 oeriments. 



Bacteria are responsible for certain vital chemical changes, but industry 

 must be alert to control the physical changes. Here the viscometer measures 

 the degree of physical change that a product undergoes. 



soil fertility. The amounts of these 

 ic colorimeter. 



Milk pasteurization may be safer v/hen the principles of this high-speed 

 pasteurizer have been fully explored and developed. 



|ue for testing pollution, is being 



To keep bacteria alive and grov/ing, special kinds of food knov/n as culture 

 media are usually prepared in test tubes. 



