INDEX 



147 



Sterilization by dry heat, 3; by 



moist heat, 9 

 Storch's reaction, 91 

 Strainers, 61 



Streak cultures, study of, 35 

 Streptococcus Hollandicus, 77 

 Streptococcus pyogenes, 115, 116, 



124 

 Sugars, 5; effect of heat on, 17; 



media free from, 70 



Temperature, effect of, on bacterial 

 growth, 88 ; relation of bacteria 

 to, 73 



Test-tube cultures, 33 ; study of, 35 



Thermal death,point, 87 



Thermometer scales, 138 

 Tuberculosis, 110 

 Tubes, plugging of, 9 

 Typhoid fever, 111 



Udder, bacteria from, 58 ; infection 



of, 59 

 Utensils, contamination of milk 



from, 60 ; washing of, 63 



Wash water, effect of, on butter, 



101 ; testing of, 102 

 Water blanks, preparation of, 18 

 Wisconsin Curd Test, 107 



Yeasts, isolation of, 78 



