238 



There certainly seems to be a relation between the amount of 

 fungus-matter and the amount of acid formed. When the fungus 

 was poorly nourished, i. e. on 0.5%— 2.5%, the Ph was net so 

 high (2.9), as when a solution, containing 4%— 5% was used (1.8). 



After this I need not crave your attention again for the dry 

 weight of the mycélium. Its behaviour is clearly seen in table 3, 

 and is very much the same in ail cases. The exact time at which 

 the maximum dry weight was reached, was more or less the same 

 always. The numerical value of the maximum weight however, 

 differs very much and was directly proportional to the amount 

 of foodmaterial supplied, so far as glucose and starch are con- 

 cerned. With the strongest solutions, 5%, about 23% was changed 

 mto fungous material; in the weakest solutions, 0.5?o, 31% was 

 used in the same way. Between thèse two extrêmes, there is a 

 regular gradation of the percentages of the foodmateriah assimil- 

 ated by the fungus. This can clearly be seen from fig. 3. 



Fig. 3. Maximum dryweight of the mycélium at différent concentrations of food- 

 material; this too has been expressed in m.Gr. 



To save the reader much unnecessary looking up of tables, I 

 wdl add in brackets on what days the maximum weight was reached 

 and its numerical value in milligrams i. g. glucose 4°o (13 — 16; 



