PROCEEDINGS OF THE CHEMICAL DEPARTMENT. 



173 



It was therefore included along with the leaves, so that separate 

 analyses of stalks and leaves, including flowers, were made. 



Peroxide of Iron, 



Lime, 



Magnesia, 



Chloride of Sodium, 



Soda, 



Potash, 



Sulphuric Acid, 



Phosphoric Acid, 



Silicic Acid, 



Carbonic Acid, 



Sand, 



Stalks. 



3-34 . . 



16-28 . . 



4-57 3 



13-15 9 



11-92 7 



8-66 . . 



5-28 . . 



Leaves and Flowers. 



. . . 2-86 



... 19-10 



88 



88 



52 



7-96 



5-93 



13-33 8-79 



3-38 6-80 



15-88 15-98 



4-60 11-30 



100-39 100-00 



And these numbers, re-calculated, after 

 carbonic acid, gave — 



deduction of sand and 



Peroxide of Iron, 



Lime, 



Magnesia, 



Chloride of Sodium, 



Soda, 



Potash, 



Sulphuric Acid, 



Phosphoric Acid, 



Silicic Acid, 



4-18 3-94 



20-31 26-26 



5-72 5-33 



16-44 13-58 



14-91 10-35 



10-82 10-94 



6-73 8-15 



16-66 12-09 



4-23 9-36 



100-00 100-00 



The total quantity in lbs. of the valuable matters contained 

 in the crop from an acre of land, exclusive of roots, was now : — 



During the month of June it thus appears that the plants, while 

 increasing in size, had undergone scarcely any change in com- 

 position, for the analyses of the stalks and leaves in this stage 

 are practically identical with those of the previous period. In 

 fact, had the leaves of the same stage been twice analysed, the 



