[ 403 ]- 
LIII. Intelligence and Miscellaneous Articles. 
NOTE ON THE SPECIFIC GRAVITY OF ELECTRO-DEPOSITED 
AMORPHOUS ANTIMONY*, BY G. GORE, ESQ. 
(THE following experiments are intended to illustrate the range of 
variation of specific gravity to which amorphous antimony is liable. 
Ten bars, each 14 inch long, were simultaneously formed, with 
their ends uppermost, in two rows of five each, upon the two oppo- 
site surfaces of a vertical sheet of silver, in a solution composed of 
teroxide of antimony and hydrochloric acid; and after being removed 
from the silver, washed and dried, their weights were taken and 
their specific gravities determined. 
No. Weight. Sp. gr. at 60° F, 
i PAS LO PIS. rates coenn te Oral 
2. NS Oe es nt Wena Suet Oo (oot 
3. P10) RE ee ler «-. 5°7536 
4. PATE SREY TEP 5°7609 
5. BAO GE 5g ene Ce ein a Oe 5°7647 
6. Aga OG. ero vee oa alae »- 5°7653 
i ee Peele eee een OU doe 
8. BAD DG orsdi. | ta win'e Kenant 2D Gee 
ai PO hie: OE TEE 5°8327 
10. pb Ts ee a 5°8330 
In the bars there were no cavities to which the differences of 
specific gravity could be ascribed. 
Birmingham, March 31, 1860. 
ON THE PRODUCTION OF OZONE BY MEANS OF A PLATINUM WIRE 
MADE INCANDESCENT BY AN ELECTRIC CURRENT. BY M. LE ROUX. 
If a platinum wire, not too large, be made incandescent by an elec- 
tric current in such a manner that the ascending flowof hot air which 
bas surrounded the wire comes in direct contact with the nostrils, an 
odour of ozone is perceived. ‘The experiment may be made in the 
following manner :—A very fine platinum wire (j;th to jth of a 
millimetre) 20 centimetres long is taken; it is formed in any 
shape, and supported in an almost horizontal position in any suit- 
able manner. A glass funnel of 2 or 3 litres is placed over this, 
so that the air has sufficient access to the wire. As the neck of the 
funnel is usually too narrow, it is cut so as to leave an aperture 
2 or 3 centimetres in diameter, on which is adjusted a glass chim- 
ney of a suitable length; the object of which is to cool the gases 
heated by the wire. The wire is then made incandescent by means 
of twelve or fifteen Bunsen’s cells. The gas issuing from the chim- 
ney is found to have the odour of ozone; iodized starch-papers are 
altered in a few minutes when placed over the chimney. In this 
case the air passing over the incandescent wire undergoes a pectiar 
modification by which it acquires the properties of ozone; but whe- 
ther this is effected by the electricity acting as a source of heat, or by 
its own proper action, must be reserved for further experiments, — 
Comptes Rendus, April 2, 1860. 
* Compare Phil. Mag. S. 4. vol. xvi.~, 452. 
