S90 Scientific Intelligence. 
vol. iv. p. 164. The principle, however, is not new ; and an 
instrument almost exactly similar to it was published by its in- 
ventor, John Farey, Esq. junicyr^ in the oxIicXq Blowpipe^ in the 
Edinburgh Encyclopedia^ vol. iii. p. 615. 
HYDROSTATICS. 
S4. Specific Gravities of d/ifferent Bodies. — The following 
Specific Gravities have been taken by MM. Roger and Dumas 
with great accuracy : 
Spec. Grav. 
Spec. Grav. 
Ice, 
0.950 
Caustic Lime, - 3.08 
Silica, 
2.650 
Carbonate of Lime, - 2.717 
Boracic Acid, 
1.830 
Anhydrous Sulphate of Lime, 2.960 
Arsenious Acid, 
3.698 
Crystallised Sulphate of I.ime, 2.322 
Protoxide of Copper, 
5.749 
Alumina, - - 4.200 
Oxide of Bismuth, 
8.449 
Nepheline, Silicate of Alu- 
Oxide of Lead, 
8.010 
mina, - - 3.270 
Peroxide of Mercury, 
11.29 
Sulphur, - - 2.08S 
III. NATURAL HISTORY. 
MINERALOGY. 
S5. Cave of KirJcdale in Yorkshire, — Some time ago a short 
account of the discovery of fossil remains of the hyaena and other 
animals in a cave or fissure at Kirjidale in Yorkshire, was 
read before the Wernerian Society. This interesting spot 
has been examined with great care by Professor Buckland, who 
has communicated the results of his inquiries to the Royal So^ 
ciety of London. The fissnre or cave, as it is termed, extends 
300 feet into a solid oolite rock, and varies from 2 feet to 5 feet 
in height and breadth. Its bottom is covered with a layer, 
about a foot thick, of mud, which is partially encrusted with calc- 
sinter. It is in this mud that the fossil animal remains are found 
imbedded. The bones are in a neariy fresh state, still retaining 
their animal gelatin. They are mostly broken and gnawed 
in pieces, and are intermixed with teeth. Portions of the dung 
of the former inhabitants of this fissure were met with, and 
which, on examination, was found to have the chemical proper- 
ties of the faeces of the canine tribe, and in its external aspect 
agreed with that of the hyaena. The fossil remmns found by 
Professor Buckland were of the following animals, viz. hyaena, 
