1816.) duting the Year 1815. 57 
slowly exhausted. A great quantity of air bubbles issued from the 
urine, and the lime-water became milky, indicating the extrication 
of carbonic acid gas. ‘The same experiment succeeded with blood; 
but new milk and ox bile scarcely rendered_lime-water milky, and 
therefore contained little or no carbonic acid. 
8. Urinary Calculii—Margraff long ago announced that he had 
discovered the presence of iron in a human urinary calculus. 
Lehmann made the same observation in 1766. More lately Pietro 
Alemanni stated to the public that he had found 21:84 per cent. 
of phosphate of iron in a calculus which he had subjected to 
analysis. (Ann. de Chimie, vol. Ixv. p. 222.) In the month of 
July last, Professor Wurzer, of Marburg, published (Schweigger’s 
Journal, vol. xiii. p. 262) the analysis of a calculus which likewise 
contained iron: the. following were the constituents of this cal- 
culus according to his experiments : 
Phosphate cal lime wisi 'b d:ci0,0 nse wine 102 SAT 
arbonate, of MMe; oon wierd iss weed ee 00k doe 
PP PALAIAL DARE OT 10 sae 4) «ja: 0x9 fata oraqundia ive MTD 
ARLES OF IOI ainiiate ay, woreses wtjersprsrn dia lacey: AD 
98°9 
9. A peculiar calculus was lately found in an external tumor 
upon the breast of a woman in Italy. It had the form of an egg, 
was two inches long, and an inch in circumference. It sank in 
water. It was composed of about 12 concentric layers, separated 
each from. the other by a black line. In the centre was a spherical 
body, less compact than the rest of the calculus, having a. crystal- 
line texture, and resembling in appearance the lens of an ox’s 
eye. ‘This substance was soluble in ether, crystallizable and com- 
bustible. Melandri, who analyzed it, considered it as pure adipo- 
cire. The cortical portion was only partly soluble in ether. 
Melandri considered it as a mixture of adipocire and of some other 
animal substance (Ann. de Chimie, vol. xciv. p. 220). 
10. Calculus foundin the Heart of a Deer. Dr. John subjected to 
chemical analysis a small portion of a calculus weighing 17] grains, 
which in 1731 had ben found in the heart of a deer, and which 
was preserved in a museum in Germany. Its colour was brownish 
yellow, and it was composed of very thin concentric lamelli. Its 
specific gravity was 2°464. He found it composed of 
Cmrbonste Of Times fii. cpascscccete 3 
Phosphate Of limes, 64.000 be ve es ae By 
Animal meters ee te tee eee e oy 
11. Dr. Prout has subjected the excrements of the boa constrictor 
to a chemical analysis. (Annals of Philosophy, vol. v. p. 415.) 
The result was most curious and most unexpected. They consisted 
almost entirely of pure uric acid. 
12. Eatable nests, ‘The nests built in some of the East India 
