GIZZARD OF FOWLS. gUl 



Sulphates of copper or tin, and acetate of lead, experienct 'E^PW'njcnts on 

 jr.- gelatine, 



no decompolition. 



Nitrates of mercury and filver are decompofed, but the 

 precipitates are much lefs copious than thofe produced with 

 the decoftion of gizzards 



Solution of tarlrite of antimony only thickened the liquor. 

 Alcohol hkewife has but little power over gelatine. The 

 precipitates obtained by means of the water of lime or of 

 barytes, as well as that by nitrate of filver, are fcarcely per- 

 ceptible. 



The deco6tion of frefti gizzard when fuitably evaporated, 

 leaves a coloured gelatinous matter, foluble in water, which 

 reddens tindure of turnfol ; gives copious precipitates with 

 lime-water and water of barytes ; decompofes fulphates of 

 iron and copper, acetate of lead, muriate of tin, tartrite of 

 antiraonial polafti, and nitrates of mercury and lilver; the 

 precipitates refulting from thefe decompofilions are generally 

 too confiderable to be attributed folely to the gelatine. 



Dried and powdered giizard poflefles charadteriftics flill 

 more diflinft from thofe of pure gelatine, whence I conclude 

 that the latter fubftance has a different operation, 



I leave pra6lilioners to decide on the advantages which the 

 medical art may derive from gizzard ; it is for them to decide 

 whether much confidence is to be placed in the notice in» 

 farted in the Journal d'Economique. And if it (hall appear 

 that the medieal ule of this material has been attended with 

 iuccefs ; it will perhaps be proper to attend particularly to 

 other fubflances which have not hitherto been fuppofed to 

 polfefs any febrifuge virtue; fuch as the falts vcith excefs of 

 acid, the oxigenated extradive and even oxigenated gela- 

 tine. 



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