46 BOTANICAL GAZETTE | JANUARY 
these preparations was that the hyphae near the mouth of the 
tube grew into the solution of copper, and continued to grow 
directly inwards until they reached aconcentration sufficient to kill 
them (fig. 5). This was found to be the case with copper, cobalt, 
nickel, zinc, etc., and also when the capillary tube contained pure water. 
Fic. 6. 
My Oshi's * method of injecting leaves with solutions by 
placing them in the solutions under an air pump and exhaust 
the injection of the leaves they 
and spores of Rhizopus were sown Be 
The preparation was then placed in a mo! 
