C Nebraska Experiment Station Research Bulletin 
temperature of this room. We feel sure that this method will 
solve the low temperature problem for the pathologist, at a cost 
which is not at all excessive ($r>() per box, completely equip- 
ped), provided, of course, there is a cold storage plant available. 
Humidity controls. — The method used in obtaining the de- 
sired relative humidities was essentially the same as that de- 
scribed by the writer 1 in his viability study of Pseudomonas citri 
Loc. cit. 
