EXPERIMENTS ON VEGETATION IN SOLUTIONS. 



375 



SUMMARY OF THE FOOD GIVEN TO A PLANT OF MAIZE AND ASSI- 

 MILATED BY IT. 



I. Period. From May 12 to June 12. — At the commence- 

 ment the plant weighed 8 grammes * ; and had six leaves with a 

 surface of 264 square centimetres; water exhaled during the 

 time = 1 litre. This period was divided into three sections, in 

 which at first dilute solutions were used. The mixtures 

 were in, — 



Section I. 

 2 cent. cub. 

 100 

 198 



Solution of KOPO5 

 Normal solution A 

 Distilled wat«r . 



Total fluid 

 Phosphate of iron 



300 



300 



306 



O'l gramme O'l gramme O'l gi-amme 



There were added as the solution was absorbed by the plant,- 



I. Section = 80 cent. cub. distilled water 

 II. „ = 350 

 III. „ = 570 



1000 cent. cub. = 1 litre 



The residue from each section = 300 cent, cub., were united 

 and analysed. 



0-5640 



0-9713 



In .the first of the following lines are placed the proportions 

 of the matters given to the plants, calculated from column A; 

 in the second, the calculations are made from column c : — 



Given ; 



Absorbed : 



Ca0^2.9;-^-^ = 1.5 

 Mu-O CaO 



1^=3-4; ^=1-5; -3_2.2 

 M<AJ CaU MsO 



SO3 

 MgO 

 ^0,_ 



2-1 



* The maize seed wore made to germinate in the month of April in well washed 

 sand; the young plants weighed on the 12th May, 8 grammes; on drying the residue 

 weighed scarcely more than the seeds. 



