REPORT OF TEE CHEMIST. 



143 



In the check, or uninoculated pots, the root systems were meagre and supplied 

 with a few small nodules only. 



In the " soil inoculated " pots there were extensive root systems, the fibres being 

 possessed of numerous nodules of a much larger size than in the preceding series. 



In the pots containing the plants grown from "inoculated seed" the root systems, 

 though larger than in the uninoculated pots, were not equal to those in the soil 

 inoculated pots, nor were the nodules quite so numerous. 



The results showed that the Nitragin had a decided effect in the development of 

 the roots, a feature that has been remarked upon by Dr. Voelcher, an English agricul- 

 tural chemist, who has carried on a series of investigations with Nitragin. 



The weight of the roots, stems and leaves on August 4th were as follows : — 



i Grams. 



Pots G.G., uninoculated, 10 plants, including roots, , 127 



Pots H.H., soil inoculated, 10 plants, " 227 



Pots I.L, seed inoculated, 10 plants, " 157 



The following table presents the analytical data, including the amounts of certain 

 constituents contained in the plants under experiment : — 



TABLE I. 



AMOUNTS OP NITROGEN, ASH CONSTITUENTS AND ORGANIC MATTER. 



Deductions. — (A.) The largest yield of crop was obtained from the soil inoculated 

 pots H.H., chiefly due to the greater weight of roots. 



(B.) The amounts of nitrogen, ash or mineral matter and organic matter in the 

 plants from pots H.H., soil inoculated, were, in most instances, considerably greater 

 than those from the inoculated seed pots I.I. 



(C.) The plants from pots 1. 1., " seed inoculated," furnished nitrogen, ash con- 

 stituent and organic matter in amounts intermediate between those from G.G., not inoc- 

 ulated, and H.H., seed inoculated. 



We may, therefore, conclude that in this experiment there has been a decided 

 advantage accruing from the use oi Nitragin, especially when employed for "soil inocula- 

 tion," and that " seed inoculation," while not giving such marked results, has neverthe- 

 less been beneficial in increasing the growth. I further think we may fairly conclude 

 that the additional nitrogen in the plants of the pots H.H. and I.T. has been obtained 

 through the agency of the Nitragin. 



