106 



Sir J. B. Lawes and Prof. J. H. Gilbert. [Jan. 9, 



smaller, more distributed over the whole root area, and less accumu- 

 lated near the surface, than in the case of the peas. Lastly, in the 

 garden soil, with its liberal supply of combined nitrogen, there was 

 mucb less development of roots, and less also of nodules, than in the 

 pots with soil-extract only. 



Received January 21. 



It has already been said that most of the blue lupins failed ; but 

 it was with the yellow lupins that the most striking results were 

 obtained. 



As in the case of the other plants, the yellow lupin seeds were put 

 in on July 10, three being sown in each pot. There were some re- 

 sowings, some seeds taken out, and, eventually, two plants were left 

 in each pot. By the end of July those in pots 2 and 3, with the lupin - 

 soil-extract seeding, already showed more growth than those in pot 1 

 without it. Photographs were taken on August 3, August 20, Sep- 

 tember 27, October 28, and November 29 ; and the plants were cut on 

 December 7. An enlargement of trie photograph taken on October 28 

 was exhibited; and the later representation, that of November 29, 

 was thrown on the screen. 



It is seen that the plants in pot 1, without soil-extract seeding, 

 scarcely appeared over the rim of the pot, one being only about 1^-, 

 and the other about 2^ inches high. In pot 2, with lupin-soil-extract 

 seeding, one plant was about 2 feet, and the other more than 1J foot 

 high ; both spreading much beyond the width of the pot. In pot 3, 

 also with lupin-soil-extract seeding, one plant was more than 2 feet, 

 but the other little more than 8 inches high . In fact, in both these 

 pots with soil-extract seeding only, the plants showed considerably 

 more development than those in pot 4 in the lupin-soil itself ; one of 

 these being only about 16, and the other about 18 inches high, and 

 both less branching than those in pots 2 and 3. 



Unlike the peas and vetches, the yellow lupins witb soil-extract 

 seeding flowered and podded freely. One plant in pot 2 had nine 

 small pods ; and one in pot 3, four large and three small ones. There 

 were also in pot 4, with lupin-soil, on one plant five pods, and on the 

 other six. 



Thus, in the quartz-sand with lupin-soil-extract seeding, the plants 

 not only produced a great deal more vegetable matter than those in 

 the lupin- sand itself, but they as freely flowered and seeded. 



Photographs of the roots of the plants in each of the four pots 

 were taken ; and enlargements of those in pot 1 without soil-extract 

 seeding, in pot 3 with soil-extract seeding, and in pot 4 with the lupin- 

 soil itself, were exhibited. 



