BY R. GREIG-SMITH. 



741 



and the bottles shaken for a day, and the extract filtered off in 

 the morning. The filtrates were distilled with magnesia, and the 

 ammonia determined. 



Experiment i. 



Paraffined blood, untreated... 



Paraffined blood, chloroformed 



Milligrams of ammoniacal nitrogen. 



41 



43 



38 



—41 



39 



43 



41 



—41 



The next experiment was made with vaselined blood and sand. 

 No soil was used, and, as a fermenting agent, a suspension of Bac. 

 prodigiosus was added. A tube containing a strip of paper 

 moistened with dilute sulphuric acid, was placed in the test- 

 bottle, to prevent any possible loss of ammonia. 



The experiments show that dried blood, saturated with paraffin 

 or vaseline, and afterwards treated with chloroform, does not 

 decay quicker on account of the chloroform-treatment. 



