EXPERIMENT STATION REPORTS. 255 



Table 1. 



(a) Nutrient Gelatin from meat infusion, pH=G.9 



(b) Kutrient Gelatin from meat infusion pH=5.G 



(c) Nutrient Gelatin from meat extract cubes, pH=6.8 



(d) Nutrient Gelatin from meat extract cubes, pH^o.G 



(e) Nutrient Agar from meat extract cubes pH=* 



(f) Nutrient Agar from meat extract cubes pH=7.0 



(g) Dextrose Agar from meat extract cubes pH=7.0 



(li) Dextrose Agar from meat extract cubes pH^^* 



(i) Nutrient Broth from meat extract cubes pH=7.G 



(j) Nutrient Broth from meat extract cubes. .. .pH=5.G 



(k) Dextrose Broth from meat extract cubes pH==7.0 



(1) Dextrose Broth from meat extract cubes pH=5.G 



♦Too acid for indicator used. 



WATERS USED. 



The Avaters used for dilution purposes in the titration of the media are 

 self-explanatory. The double distilled water Avas distilled twice Avhile 

 the ordinary distilled water was distilled but once. The other waters 

 used' are all from different sources. The East Lansing water, the col- 

 lege water, and the Lansing water are all from deep wells, these being 

 the sources used for obtaining water in tliese places. A list of the waters 

 used giving their pH values is found in Table 2 and their chemical com- 

 position is found in Table 3. Tlie waters used for dilution purposes in 

 titration with their pH value were as follows : 



Table 2. 



I. Double-distilled water pH=5.G 



II. Ordinary distilled water pH=G.S 



III. East Lansing, city water pH=8.0 



IV. College tap Avater pH=7.2 



V. Lansing, cit}' Avater pH=7.2 



VI. Cedar River Water pH=8.0 



VII. Well water, A pH=7.G 



VIII. Well water, B pH=7.8 



Analyses of six of these waters (Nos. II, IV, V, VI, VII and VIII) 

 were made for us by the Chemistry department of the M. A. C, Experi- 

 ment Station and are given in Table No. 2. 



