12(5 



STATK BOARD OF AOFllCUl/rURlC. 



A COI^VENIENT PETRI DISH RACK. 



OTTO RAHN. 



This rack is shown in the accompanying photograph. I saw these 

 racks at first in the laboratory of Professor Fleischmann in Gottingen, 

 and I believe that the original idea came from Dr. Leichmann. Since 

 I have never seen them in any other laboratory, nor in any catalog, 

 it may be worth while to recommend them for general use, because 



they are inexpensive and very handy for keeping and carrying plates. 

 They are made from strips of galvanized sheet iron, and are riveted 

 together to stand the heat of the hot air sterilizer. One of these side 

 strips may be opened by a hinge and may be fastened with a hook. 

 Our racks are 18 cm high and hold 10 dishes. 



