170 



INDEX 



Tollen's solution, 1 24 

 Trommsdorf s reagent, 136 

 Turmeric paper, 37 



UREA, ammonification of, 35, 36 

 gelatin, 99 

 solution, 98, 99 



Urea-ammonium nitrate agar, 96 

 Urea-fermenting organisms, crystals 



around, 37 

 isolation of, 36, 37 



Urease, preparation of, 37 

 Uric acid, 100 



WASHED agar, 105 

 Water blanks, 19 



Weights, conversion tables, 162, 163 

 Winogradsky's solution for nitrogen 

 fixing bacteria, 109 



YEASTS, solution for, 119 

 Yeast-water, 120 



