108 THE BIOLOGY OF DAILY LIFE. 



(5.) 



THE LEUCOCYTE AND YEAST-ORGANISM IDENTIFIED. 



At p. 7 of Physianthropy, there is a popularly- 

 expressed account of a ready method of trying 

 experiments which most inadequately represents the 

 real severity of the test conditions under which all 

 experiments in the cultivation of micro-organisms must 

 be conducted. 



The result of carefully conducted experiments may 

 be thus given. 



In thoroughly sterilized media (such as grape sugar 

 and water, or apple-juice) leucocytes can be directly 

 cultivated out of brewer's yeast, every precaution 

 known to the microbe cultivators' science to prevent 

 contamination or error being rigidly observed. 



But a still better mode of experimenting, in my 

 opinion, is the more strictly biological method, viz., 

 watching and noting the phenomena presented spon- 

 taneously by the living (human) body, when leucocytes 

 are cultivated in its tissues and blood. 



I do not justify any experiments in the production 

 of disease, initiated for the purpose of gaining in- 

 formation. This is a doing of evil that good may 

 come, out of which no true science, no real good, has 

 ever come. But the practice of inoculating with 

 leucocytes is now so extensively practised under the 

 name of vaccination, that an am pie field, white already 

 to the harvest of disease-phenomena, is ready for the 

 gathering. Any careful observer can glean useful 



