STUDIES ON FERMENTATION. 



293 



Pure lactate of lime . . . . . . 225 grammes 



Phosphate of ammonia . . . . 0*75 ,, 



Phosphate of potassium . , . . 0'4 „ 



Sulphate of magnesium . . . . 0'4 „ 



Sulphate of ammonia . . . . 0'2 „ 



[1 gramme= 15*43 grains.] 



On March 23rd, 1875, we filled a 6 litre (about 11 pints) 

 flask, of the shape represented in Fig. 69, and placed it over a 

 heater. Another flame was placed below a vessel containing 

 the same liquid, into which the curved tube of the flask was 



Fig 69. 



plunged. The liquids in the flask and in the basin were raised 

 to boiling together, and kept in this condition for more than 

 half-an-hour, so as to expel all the air held in solution. The 

 liquid was several times forced out of the flask by the steam, 

 and sucked back again ; but the portion which re-entered the 

 flask was always boiling. On the following day, when the flask 

 had cooled, we transferred the end of the delivery tube to a 



