1822.] New Scientific Books. 471 
stalactitic masses, from one ta three inches in length, and one or more 
in breadth, consisting of elongated tuberous branches united in a pa- 
rallel direction. It is rather harder than calcareous spar, is slightly 
translucid, and has a specific gravity of 2°40. It does not effervesce 
with acids, and whitens before the blowpipe. 
According to the analysis of Dr. Torrey, of New York; who was 
particularly careful in ascertaining that it contained neither fluoric acid 
nor phosphoric acid, the constituents of gibbsite are : 
Alumina. .... ie Pade ballet Kdaelats £0499 
WV ALORE cs ca op oie satin cece 6d RISERS Pes: har f 
MOBS E asc efeia eines AE Nate atabeterrnife Bcd aol 05 
100:0 
(Ibid. p. 388, from the New York Med. and Phys. Jour. No. 1.) 
IX. Tungstate of Lime. 
A specimen of this substance found in America, and analyzed by Mr. 
Bower, gave 
DumesticwCid . -.. ised «uss shonin 76°05 
RUNGE EC ls. G Son ele cee tee a ae 14°36 
MIG an Areata tdci e ae, ehepsce'd 2°54: 
Oxide OF 3FON 3). -..\-.- 0.0. a0 a dnd eid OS 
Oxide of manganese............- 031 
99°29 
Loss. .... Aout aber emis Son cane 0°79 
100°00 
(Silliman’s Journal.) 
ArricLe XII. 
NEW SCIENTIFIC BOOKS 
PREPARING FOR PUBLICATION, 
Dr. Henry is printing a New Edition of his Elements of Experi- 
mental Chemistry, with great Additions, and Alterations. 
A Journal of a Horticultural Tour through some Parts of Flanders, 
Holland, and the North of France in the Autumn of 1817, by a Depu- 
tation of the Caledonian Horticultural Society. 
JUST PUBLISHED, 
Transactions of the Geological Society, Vol. I. Part I. Second Series. 
4to. 1. 11s. 6d.—This volume contaius the following papers: On the 
Geology of the Southern Coast of England, from Bridport to Babbi- 
combe Bay; by H. J. de la Beche, Esq. Onthe Bagshot Sand; by 
Henry Warburton, Esq. On a Freshwater Formation in Hordwell 
Cliff; by Mr. Webster.. On Glen Tilt ; by Dr. Mac Culloch. On the 
Excavation of Valleys by Diluvian Action; by the Rev, Prof. Buck- 
