BY A. H. MOSELEY AND H. G. CHAPMAN. 



Table vii. 

 Acidity of milk, 17°. 

 5 e.c. milk in each tube. 0*15 c.c. rennet in each tube. 



573 



Tube. 



-£yNaOH. 



|n a ci. 2 



Result. 



1 



— 



1 c.c. 



Clotting in 6 min. 



2 



01 c.c. 





6 „ 



3 



0-2 c.c. 





6-5 ,, 



4 



0-3 c.c. 





15 ,, 



5 



0-4 c.c. 





17 ,, 



6 



0-5 c.c. 





28 ,, 



7 



0-6 c.c. 





32 ,, 



8* 



— 



" 



No clotting. 



Some experiments of this nature are recorded in Table viii. 

 Calcium lactate was found to behave similarly to calcium chloride. 



Table viii. 



Acidity of milk, 15°. 

 5 c.c. milk in each tube. 



Tubes. 



T N F NaOH j Eennet. 



- 7 c.c. 

 0-5 c.c. 

 07 c.c. 

 0-5 c.c. 

 0-7 c.c. 



0-2 c.c. 

 0-15 c.c. 

 - 15 c.c. 

 1 c.c. 

 1 c.c. 



after 98 min., added 0'3 c.c. 5CaCl 2 

 after 300min., added 0"1 c.c.|CaCl. 2 

 after 300min., added 0-1 c.c. iCaCl 2 

 after 226min. , added 0"1 c.c.5CaCl 2 

 after 226min., added 0'1 c.c. 4CaCl 2 



Result. 



No clotting. 



The effect of sodium lactate. — If the acidity of milk be due to 

 lactic acid, as is usually stated, the addition of insufficient soda 

 to neutralise the acid would lead to the formation of sodium 

 lactate. When varied amounts of T ^ sodium lactate were added 

 to milk, results similar to those in Table ix. were obtained. With 

 increasing quantities of y^- sodium lactate from 0*1 c.c. to 0*7 c.c. 

 to each 5 c.c. milk, little or no alteration in the time of clotting 

 was observed. 



*No rennet. 



