Feb. 1S97.] BOTANICAL SOCIETY OF EDINBURGH 



35 



Howering and fruit-bearing up till the autumn. The plants 

 in the other four pots were quite withered by the end 

 of August. On 20 th October the plants were cut, and the 

 above-ground parts analysed. For comparison, here are 

 the results in the cases of the non-inoculated, inoculated 

 with phaseolus, and inoculated with pea — 



That is, the plants inoculated with pea bacteria, com- 

 pared with the non-inoculated, showed twenty-four times 

 more of dry substance and fifty times as much nitrogen 

 content. 



At the time of cutting, the plants had for each experi- 

 mental pot — 



II. EXPERIMENT WITH VICIA VILLOSA. 



This experiment was conducted under the same con- 

 ditions as the last, only the pots contained Vicia villosa 

 plants instead of peas. 



The most noteworthy thing about this experiment was 

 that the best results were given with the vetch plants in 

 the pot inoculated with pea bacteria (vetches and peas are 

 nearly related), and the next best results in the case of 

 inoculated with phaseolus bacteria. The plants inoculated 



