274 Prof. H. Rose on the Inorganic Constituents 



Aqueous extract. — On evaporation to dryness it left a residue 

 of r 93 3 grm., consisting of — 



Chloride of sodium . 

 Chloride of potassium 

 Potash .... 

 Hydrate of potash 

 Phosphoric acid . 

 Sulphuric acid 

 Silica .... 

 Carbonic acid . . 



3-15 

 0-37 



27-81 

 54--18 

 6-75 

 1-57 

 0-52 

 5-65 



lOO'OO 



The large amount of hydrate of potash was produced by 

 the action of the carbon upon the alkaline carbonate. These 

 constituents correspond to the following salts: — 



Chloride of sodium . . . 

 Chloride of potassium . . 

 Tribasic phosphate of potash 

 Sulphate of potash . . . 

 Silicate of potash .... 

 Carbonate of potash . . . 

 Hydrate of potash . . . 



3-15 



0-37 



20-13 



3-41 



1-05 



17-71 



54.-18 



100-00 



Muriatic extract.-^Th'xs left 6-493 grms. of residue, con- 

 sisting of — 



Potash . . . 

 Soda .... 

 Lime . . . 



Magnesia 

 Phosphoric acid 

 Sulphuric acid 

 Silica . . . 

 Peroxide of iron 



10-22 



1-06 



31-32 



13-98 



41-69 



0-18 



0-23 



1-32 



100-00 



3CaO+P05 56-98 



3KO + PO5 15-38 



3NaO + P05 1-87 



3MgO + P05 18-30 



r) CaO, SO3 . 0-31 



CaO, SiOg . 0-36 



MgO / . 5-48 



^FcgOg . . 1-32 



100-00 



The magnesia must have existed in the carbonized mass in 

 the form of carbonate. 



liesidua?y carbonaceous mass. — This was considerable, and 

 consisted principally of sand, part of which existed as such in 

 the faeces, and even in the food ; part must have been swal- 

 lowed in the form of dust during the exercise taken by the 

 subject of the experiment in the fields near Berlin. The 

 residue weighed 1-996 grm., and consisted of — 



