American Method. 
217 
inoculating material. This is further borne out by examination 
of the roots of the various plants, for in no case was there to 
be noticed the presence of nodules with the treated seed where 
these did not occur also with the untreated seed. Nor was 
there any increase in the development of nodules as the result 
Not treated. Inoculated. Nut treated. Inoculated. JSot treated Inoculated 
Fig. 4.— Inoculation Experiments. American Method — Melilotus, 
Fig. 5. — Inoculation Experiments. American Method — Soy Bean. 
of the treatment. Numerous photographs were taken, both of 
the growing plants and of the roots, but these were, with few 
exceptions, negative in character. The principal results are 
shown in Figs. 1-5, pp. 212, 213, and 217. 
Dealing with the individual crops, it may be remarked 
that (1) with peas there was no consistent increase in grain 
from the treatment, the sterilised soil and the plot in the open 
