tt2 Scientific Intelligence, [Feb. 



III. Comparative Analysis of the Food and Excrement of the Nigfit- 



ingale* 



M. Braconnot having collected the excrement of a nightingale, with 

 the intention of extracting uric acid from it, which it contains in great 

 abundance, afterwards undertook to compare its constituent principles 

 with those of the ox's heart upon which tlie bird was fed. 



Three hundred parts of ox's heart yielded the following substances : 



Water 23M 1 



Fibrine, vessels, nerves, cellular membrane, fat, and phosphate 



of lime , 54*59 



Albumen retaining the colouring matter of the blood, phos- 

 phate of lime and magnesia 8*20 



Extractive matter soluble in alcohol (ozmazome) ^'TO 



Lactate of potash , 0'56 



Phosphate of potash O'^S 



Chloride of potassium 038 



Ammoniacal salt and free acid A trace 



30000 



Thirty-six parts of the excrement of the nightingale yielded the 

 following substances: 



Super-urate of potash and ammonia. . . . , 19*00 



A peculiar substance slightly animalized, soluble in water, and 



msoluble in alcohol 12*00 



Ferruginous phosphate of lime 1*50 



Sulphate of potash 1-20 



Picromel 1 00 



Chloride of potassium , 0*23 



Phosphate of potash and ammonia 23 



Unknown combustible acid combined with ammonia 0*20 



Ammoniaco-magnesian phosphate. 0*08 



Free lactic and acetic acid about 010 



Mucus .. 010 



Peculiar black matter, resembling that found in urine by M. 



Proust, from 1 to 010 



A brown thick oil readily soluble in alkalies and in alcohol from 



0-5 to 0*05 



Muriate of ammonia estimated at 0*05 



35-84. 



(Annales de Chimie.) 



IV. Analysis of Black and Green Tea, 



Mr. Brande has lately made a comparative analysis of black an^ 

 green tea, from which he finds that '* the quantity of astringent mat- 

 ter precipitable by gelatine is somewhat greater in green than in black 

 tea, though the excess is by no means so great as the comparative 

 flavours of the two would lead one to expect. It also appears that the 

 entire quantity of soluble matter is greater in green than in black tea. 



