MR. R. RIGG'S EXPERIMENTS ON NITROGEN IN VEGETABLE PRODUCTS. 401 



Table Vllf. 



Carbon. 



Ilydr. 



Oxygen. 



Nitr. 



Resid. 



Water. Total. 



Nitr. for 

 1000 Carb. 



First small leaves from the lime tree in May 



From the same in September 17 



From the same in October 12 , 



Acacia leaves, August 26, 1836 



Acacia leaves, October 20, 1836 , 



Almond leaves, August 26, 1836 



Almond leaves, September 27 , 



Plane tree leaves, September 26, 1836. . 



Plane tree leaves, October 26 



Red currant. May 3 



Red currant, August 25 



Very young ivy 



Full grown ivy 



Decaying ivy 



Oak leaves, July 1836 



Oak leaves, August 



41-9 

 34-3 

 33-8 

 43-3 

 39-8 

 37-5 

 37-0 

 41-4 

 45-3 

 40-1 

 44-6 

 40-4 

 41-6 

 42-4 

 40-8 

 38-4 



1-0 



0-4 



1-6 

 0-4 



0-6* 



7-1 

 3-6 

 2-9 

 6-2 

 3-3 

 4-4 

 3-8 

 2-7 

 2-4 

 6-2 

 5-7 

 3-6 

 3-2 

 2-2 

 4-3 

 3-8 



6-5 

 5-4 



5-6 

 4-4 

 6-4 

 3-8 

 4-0 

 4-4 

 3-8 

 3-5 

 3-6 

 4-6 

 5-2 

 5-8 

 3-9 

 4-0 



43-5 

 45-4 

 54-3 

 45-7 

 50-5 

 42-6 

 55-2 

 32-8 

 48-.5 

 48-2 

 46-1 

 49-8 

 49-6 

 49-6 

 50-4 

 53-8 



100 

 100 

 100 

 100 

 100 

 100 

 100 

 100 

 100 

 100 

 100 

 100 

 100 

 100 

 100 

 100 



169 



105 



76 



144 



82 



118 



102 



65 



53 



155 



129 



90 



78 



52 



104 



100 



The analyses of the different parts of the flowers of plants are full of interest. The 

 parts not only differ in chemical constitution with their state of developement, as 

 appears in Table IX. , in the instance of the rose, where the full-blown petals con- 

 tained twenty-four parts of nitrogen, and the unexpanded and central petals con- 

 tained sixty-six parts ; but the various portions differ very materially from each 

 other, and when taken in connexion with the germination of seeds, the growth of 

 plants, their aliment, &c., throw much light upon the whole subject. 



Table IX. 



Without adding to the number of experiments already furnished, I would observe, 

 that I have not analysed any product in a natural state wherein I have not found 

 both nitrogen and residual ; and, of the great number that I have subjected to this 



MDCcrxxxviii. 3 F 



