488 



Ml:. .1. B, \.\\\ BS, DE. OILUEHT, wi» DE. PUOB OS 



Table 1 1. — Showing the ounl and the composition of the G d ofl bj 



plants, in the shade, into a Torricellian vacuum. 



D 



iption. 



Pari ,.' 



How manured, &c. 





i 



8 



Oxygen. 





1 



Wheal ; 1858. 



June 16. 

 Jane 17. 

 June 16. 

 June ](!. 

 Juno )(>. 



Whole plant 



plan! 

 I >I:t lit 



i 



i I manure 



Mineral '■ ; manure 



Mineral and Ammoniacal manure 



SI 10 

 17-50 



Barley; 1857. 



June - 1. 

 June 24. 



Whole plant 



Dnma 



inured 



8-6 

 20-9 



85-12 



81-48 



3-93 



197 



11 88 

 16-55 ii 18-52 



Beans; 1858. 



June 17. 

 June 17. 

 June 17. 

 June 17. 



coming into Flower 



o Flower 



Whole plants coming into Flower 



rjnmanured 



Unmanured 



Ammoniacal manure . 



1326 

 19-62 



1567 



Clover: 1857. 



Aug. lO.lHeads 



Aug. 10.Stems and Leaves 



An 11. Seeds 



An ! I. Sterna and Leavea 



Dhxnanured 



I'niiianured 

 Dnmanured 

 Cnmanured 



8 39 



1441 

 10-96 

 2037 



14 39 

 16-77 

 12-85 



21-68 



These experiments also tend to show that the reducing-power of certain of the 

 carbon compounds of the plant was sufficient to convert nearly all the oxygen (or ozone) 

 present into carbonic acid, when in the shade. 



The next point is to consider how far the conditions are favourable to the oxidation 

 of Nitrogen in the vegetable organism, when the plant is subjected to the action of the 

 direct rays of the sun. 



Experiments, Series 3. 



In these experiments, in which over 100 exhaustions were made, the operation was 

 conducted precisely as in the case of the last experiments, with the exception that the 

 plants were exposed during the whole process to the direct rays of the sun. The 

 following Table exhibits a few of the results obtained, which are sufficient for our 

 present purpose. 



