COMPOSITION OF GREEN RYE AND RAPE. 



11 



fore suggested to my friend and pupil, Mr Faber, the propriety of 

 determining the amount of sulphur and phosphorus in rape, and 

 am also indebted to him for the subjoined ultimate organic ana- 

 lyses, and the ash analyses of rape-leaves. 



In two different samples of rape the per-centage of sulphur and 

 phosphorus was found for the dry substance : 



Sulphur, 

 Phosphorus, 



I. 



.79 

 .84 



II. 



.87 

 .73 



Average. 

 .83 

 .78 



The dry leaves thus contain nearly one per cent of sulphur, and 

 an equal amount of phosphorus in organic combination. 



ULTIMATE ANALYSES OP EAPE-LEAVES. 



The samples analysed, on an average, contained 9.20 per cent of 

 ash, and contained in 100 parts 



Carbon, 41.05 



Hydrogen, 



Oxygen, 



Nitrogen, 



Sulphur, 



Phosphorus, 



Ash, 



5.80 

 38.32 



4.02 

 .83 

 .78 



9.20 



100.00 



In the following table the results of the detailed proximate 

 analyses of rape in a fresh and in the dried state are contained : 



In dry state. 

 Water, 



Soluble albumen, 

 Insoluble protein compounds, 

 Cellular fibre, 



Inorganic matters, attached to the fibre, 

 Gum and pectin, 

 Salts insoluble in alcohol, 

 Sugar 



Salts soluble in alcohol, 

 Fatty matters, with a little chlorophyll, 



In natural state. 



87.050 



1.640 



1.493 



3.560 



.432 

 1.729 



.990 

 2.218 



.186 



.649 



12.664 

 11.529 

 27.490 



3.335 

 13.351 



7.645 

 17.622 



1.435 



5.016 



The ash of rape, analysed in my 

 tained in 100 parts 



99.947 99.587 



laboratory by Mr Faber, con- 



Potash, 



Chloride of potassium, 



Chloride of sodium, 



Lime, 



Magnesia, 



Oxide of iron, 



Sulphuric acid, 



Phosphoric acid, 



Soluble silica, 



Carbonic acid, 



Sand, 



Charcoal and loss, 



31.51 



5.88 



.82 



16.97 

 1.58 

 1.27 



12.54 

 9.40 

 2.04 



12.78 ) 



4.32 



.89) 



100.00 



After deduction of carbonic 

 acid, sand, &c. 

 38.42 



7.17 



1.00 

 20.69 



1.93 



1.55 

 15.29 

 11.46 



2.49 



100.00 



