Journal of Applied Microscopy. 633 



be shortened, as the preliminary heating in a water bath after the addition of egg 

 albumen becomes unnecessary. 



The solution of calcium chlorid is cheap, permanent, and non-corrosive. The 

 writer has used the same solution for nearly two years, merely adding water from 

 time to time to replace that lost by evaporation. It is not even necessary to 

 remove it from the agate boiler. R. B. F. Randolph, A. C. 



Associate Director, Hoagland Laboratory. 



Record Cards for Embedded Material. 



The card reproduced herewith is one of the regular catalogue cards, three by 

 five inches, specially printed. Throughout the process of fixing, washing, 

 dehydrating, etc., as well as of collection, the card accompanies the bottle bear- 

 ing the same number, and at each step the proper item of record — as time^ — is 

 entered. 



When large quantities of material are being prepared, a temporary memo- 

 randum at least has always to be provided for each lot. This card serves such a 

 purpose better than note book or label. And the record once made is in this 

 form easily filed for reference when the material comes up for study. If two or 

 more persons are cooperating, the card, placed perhaps under the bottle on the 

 table, shows what has been done and what is next to be done. 



I find that the method both hastens the work and tends to prevent mistakes, 

 whether of record or of procedure. 



Robert G. Leavitt. 

 Ames Laboratory. 



