34 



BACTERIA IN RELATION TO PLANT DISEASES. 



paper,* using a hot-water funnel. Later he followed Schutz's method ('92, Bibliog., 

 XVI), which is a very good one. This consists in cutting the agar into small bits 

 and first heating it very hot in a beaker or enanieled-iron dish in a minimum quantity 

 of water or beef-bouillon over a hot Bunsen flame with constant and rapid stirring and 



Fig. 32.f 



*The folded filter papers are the most convenient (fig. 34). These filter papers give the starch 

 reaction (blue) with iodine, and reduce Fehling's solution on being boiled in it. 



tFiig. 32. -Unnamed species of red sea-weeds (GV/jrfm) furnishing agar-agar. From a Japan- 

 ese chart showing " Tlie principal aquatic plants o f Japan," supposed to be an official publication. 

 One-half natural size. Original in library of United States Fish Commission. 



