26 



DR. F. DARWTH OX THE 



tallies with an unrecorded impression that the fed flower-stems 

 were previously much greener than the starved plants. 



At the end of August the capsules were mostly ripe ; and as 

 there was the danger of loss of seeds by the bursting of cap- 

 sules, the flower-stems from all six plates were cut on August 31 

 and September 1st. Thirty capsules were taken by chance from 

 the fed and the same number from the starved stems. When dry, 

 the capsules were opened and their seeds carefully counted under 

 a dissecting-microscope. The stems were set aside to dry, and were 

 then measured, weighed, &c, as shown in the following Tables. 



Table VI. 



A. 



13. 



The numbers, heights, and weights 

 of the starved and fed plants. 



Proportion between the numbers 

 in the starved and fed columns of A ; 

 " starved v being taken =100. 



Number of plants in plates I., III., 

 and VI., roughly counted (June 12th) 



Starved. 

 49 



Fed 

 45 



Number of plants (including mi- 

 nute offsets) accurately counted, 

 Sept. 3rd. 



Starved. Fed. 



100 : 91-6 



82 



84 



Total weight of 81 fed and 83 

 starved plants without flower-stems. 

 Dried at 80°-90° C. 



100 : 1012 





grm. 



1176 



grm. 

 1-429 



100 



121-5 



After gathering and washing the plants, they were preserved in spirit 

 with a view to examining the root-stocks to compare the amount of starch ; 

 this was, however, found impracticable. The alcohol which had contained 

 the fed plants was much more discoloured, showing that they contained 

 more chlorophyll. I intended to evaporate the alcohol and add the weight 

 of the residue to the dry weight of the plants. This, however, failed, owing 

 to an accident with the water-bath. 



