54 



A MANUAL OF THE ASPERGILLI 



Fig. 14. Apparatus employed at the Northern Regional Research Laboratory for 

 preserving microorganisms in lyophile form. A , Table model of thirty tube capacity, 

 utilizing a trap immersed in a Dewar flask filled with CO2 ice and methyl cellosolve 

 to collect the water vapor removed from the drying preparations. B, Larger, self- 



