No. ".] MISCELLANEOUS. 447 



Plant No. I., grown without tlio manure. wciii:hed 4 lbs. 

 2h ozs. 



Plant No. II., grown with the aid of the manure, reached the 

 great weight of 9 lb.s. 3 ozs. 



Plant No. III., ahso treated with the manure, but under 

 different circumstances to those of No. II., weighed 8 lbs. 6 ozs. 



These were grown in a garden in tlie vicinity of Lower Nor- 

 wood, Surrt'3\ 



Now, various parts of the leaves and of the stem of each plant 

 were separately reduced to a.shes. the greatest care being taken 

 in the incinerarion, to prevent the alkaline salts fusing, &c. The 

 plants were burnt on a platinum sheet made i"n the shape of a 

 muffle, and heated at a low temperature in a gas furnace. The 

 ashes irave the followino- results on bcin^, submitted to chemical 



analyses : — 



Xo. I. No. II. No. III. 



, , , " , ' , 



Leaves. Stalk. Leaves. Stalk. Leaves. Stalk. 



Potash 33-951 41-231 31-634 39-223 31-521 38-929 



Lime 15-665 13-601 14-210 13-583 14-310 13-621 



Soda 2-523 4-296 1-825 2-360 1-917 1-813 



Iron (Fe203)— 



8-323 1-502 12.290 3-521 11-832 3-005 



Magnesia.. 4-936 6-210 3-128 6-000 2-921 5-942 

 Phosphoric Acd) — 



12-931 14.463 16-210 18-944 16-123 18-891 

 Sulphuric acid — 



8-613 9-619 7-641 8-916 7-592 8-922 



Chlorine.. 7-994 6-781 7-310 4-200 7-400 4-319 



Silica 4-999 2-294 5-631 3-121 6-26.^ 4-468 



99-935 99-997 99-879 99-868 99-881 99-910 



It will be seen from the above analyses that the plants treated 

 with the manure contain a larger proportion of iron than those 

 grown without the manure, and the leaves contain a larger per- 

 centage of iron than the stalks. 



The conclusions to be drawn from these experiments are: — 



1st. — The plants when grown in soil containing iron in a 

 soluble form, and with phosphoric acid also in a soluble form, 

 are healthier and larger than if they had been grown in a soil 

 which did not contain these soluble compounds. 



2ud. — The plants grown in .soils containing this mineral 

 manure appear to ab.sorb larger quantities of soluble iron and 

 soluble phosphites than when not so treated. 



