Photograph of an engraving could be taken by the camera in a yery short 
fime.—Roy. Cornw. Polytech. Soe. 1855, xii. 
, chlo 
hesium 6°8121, chlorid of calcium 1°47 19, bromid of magnesium 01838, 
sulphate of potash, 0-0627 = 13°8790. Specific gravity 11160. The 
water was collected in June of 1854. 
0. Density of the Waters of the Caspian Sea; by A. Morrtz.—Mr, 
Moritz visited the Southwest coast of the Caspian in the summer of 1850, 
and obtained the following determinations of the density—At Derbent, 
100524, at 22° R.; at Baku, 1:00616 at 221° R., and 1-00976 at 81° 
R.; at Persien, 1-00583, at 226° R.—Bullet. St. Petersb. Phys. Math., 
_ xiv, 162-168, 
ll. Well in the Desert of Sahara.—A well sunk at Tamerna in the 
ara to a depth of 66 yards, gave on the 9th of June last a jet or flow 
of water amounting to 3600 litres per minute. 
12. Composition of the Water of the Delaware River; by Henry 
Wortz.—The water analyzed by Mr. Wurtz, as cited in this volume, page 
124, was taken from the Delaware River at Trenton, New ersey. 
3. Aluminium.—aA watch whose works were made of aluminium was 
on exhibition at the Paris Exhibition. : 
14. Officers of the Academy of Science of St. Lowis, for 1856.—Presi- 
dent, George Excetmany, M.D.; 1st Vice President, Hrram A. Prov, , 
-D.; 2nd Vice Preside: t, Narnanre, Homes; Secretaries, Bens. F. 
Saumarp, M.D., Wx, H. Tineiey, M.D.; Treasurer, J. B. Eans. 
of scienee. His papers in this Journal treat of topics connected with 
Galvanism and electro-magnetism, in which he invented some new pieces 
