Notes . 
387 
May 5. Examined from box B : 10 plants; no case of tubercle. 
(from shaded end of boxes.) 
,, 12. „ „ A: 10 plants; one with tubercle. 
,, ,, B: 10 „ three with tubercle 
(shady). 
,, „ B: 12 I, eight with tubercle. 
Summary. Of the thirty- six plants examined from box A, only 
three had developed tubercles ; whereas of the forty-eight plants 
examined from box B, twenty-five had developed tubercles. There 
was considerable mortality among the plants in box A ; in box B, 
several of the seeds failed to germinate. 
Experiment II. The boxes in this case were in the open air in a 
sunny situation, and were exposed to the rain. 
1888. May 14. 50 bean-seeds were soaked for 48 hours in 700 cc. of 
solution of 1 p. cent. KN 0 3 ; 50 seeds were soaked 
in water for 48 hours. 
„ 1 6. the 50 seeds soaked in KNO s solution were sown in 
sand in box A, and the remainder of the solution 
was poured on the sand. 
The 50 seeds soaked in water were sown in box B. 
,, 23. 13 grams KN 0 3 added to A. 
» 3 °* 10 » ,5 „ >, 
June 6. 10 
,, 13. 10 ,, ,, ,, ,, 
,, 22. Examined from box A: 12 plants, two had tubercle. 
,, B : 48 plants, all of which, ex- 
cept one, a small weak 
plant, had tubercle. 
„ 29. ,, „ A: 12 plants, one had tubercle 
on youngest roots. 
July 6. „ ,, „ A: 12 plants, two had tubercle 
on youngest roots. 
Summary. Of the forty plants which developed in box A, only five 
produced tubercles ; whereas 47 out of 48 in B produced tubercles. 
Experiment III. After having removed the tuberculous plants 
from box B in experiment II, 50 seeds were sown in it on June 27, 
the same sand, to which 50 grams KN 0 3 had been added, being used. 
July 17. examined one, free from tubercle. 
„ 18. added 20 grams KN 0 3 . 
