Analjjsis of the Uihie of the Calf and Sheep. 49 



tate consisting of peroxide of iron in combination witli the two sub- 

 stances. Now on boiling this precipitate with an excess of perchlo- 

 ride of iron, the alizarate of iron dissolves, forming a dark brown so- 

 lution, while the iron compound of the other substance remains 

 behind. On adding muriatic acid to the filtered solution, the alizarin 

 separates in yellow flocks and may be purified by crystallization from 

 alcohol. The other substance, to which I have not yet given a 

 name, is obtained by decomposing its iron compound, which remains 

 behind on treating with perchloride of iron, with muriatic acid, and 

 washing till all the oxide of iron is removed. It seems also to be a 

 colouring matter, as it dissolves with a red colour in alkalies and 

 gives red compounds with the earths and metallic oxides. It is 

 insoluble in water, but soluble in alcohol with a yellow colour. It 

 therefore resembles the resins in its general properties. It cannot 

 be obtained in a crystallized state. From a hot concentrated solu* 

 tion in alcohol it separates on cooling as a yellow powder. It im- 

 parts no colour to mordanted cloth. 



VIII. Comparative Analysis of the Urine of the Calf and the 



Sheep^. 



MBRACONNOT finds that the urine of the calf, 

 • nourished by tlie milk of the mother, consists of — 



grs. 

 Ammoniaco-magnesian phosphate .... 0"18 



Chloride of potassium 3*22 



Sulphate of potash . , 0'44< 



Urinarv animal matter") „ _ „ 



Urea / ^'^^ 



Phosphate of iron " 



Phosphate of lime 



Phosphate of potash 



Combustible acid combined with potash ^ . . traces 



Silica 



Mucus 



Chloride of sodium ? 



Water 993*80 



looaob 



A litre of the urine of the sheep yielded — grs. 



Chloride of potassium 6*13 



Sulphate of potash 3*74f 



Carbonate of magnesia . r40 



1 



> quantities undetermined. 



Urea 



Urinary animal matter 

 Hippurate of potash 

 Bicarbonate of potash 

 Carbonate of lime 



Mucus 



Oxide of iron . . 



* From the Annates de Chimie et de Physique, Juin 1847. 

 Phil. Mag. S, 3. Vol. 3 1 . No. 205. My 1 847. E 



