No. 7.] MISCELLANEOUS. 447 



Plant No. I., grown without tlic manure, weighed 4 lbs. 

 2J ozs. 



Plant No. II., i^rown with the aid of the manure, reached the 

 great weight of 9 lbs. 3 ozs. 



Plant No. III., al-so 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 the vicinity of Lower Nor- 

 wood, Surrt-y. 



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



were separ.itely reduced to ashe.'^. the greatest care being taken 



in the incineration, to prevent tlie alkaline salts fusing, &e. The 



plants were burnt on a platinum sheet made in the shape of a 



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



ashes iiave the followinii- results on being submitted to chemical 



analyses : — 



No. 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 Acin — 



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 6-265 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 conjpoutids. 



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

 manure appear to absorb larger quantities of soluble iron and 

 soluble phosphites than when not so treated. 



