IV] 



PREPARATION OF CULTURE-MEUIA 



51 



keep the tubes in a slanting position, so, as to allow the 

 serum to spread out into a layer which is sufficiently 



Fig. 10.— Huei'pe's Serum Insi'Issatoe. (Made by Lauteiiichlager in Berlin.) 



transparent even after solidification. For this purpose 

 Hueppe's serum inspissator is generally used. 



In order to keep and protect cultures in tubes or flasks 



