SCIENTIFIC SUilMARY. 
395 
grafia says, “ Experience has demonstrated the difficulty of removing from 
positive proofs on paper the last traces of the hyposulphite vrliich has been 
used in the fixing. Among the various methods proposed for the complete 
removal of this salt, which if it be allowed to remain slowly destroys the 
proof, causing it to acquire a yellow colour, we proceed to explain that 
which has been suggested by M. Spiller. 
“ It consists in washmg the proofs for an hour, changing the water in 
which it is done three or four times. The proofs are then placed in a 
solution of common salt-and-water (about 62 drachms of salt to 35 ounces of 
water), in which they are kept for twenty minutes ; this solution may be 
used indefinitely ; finally, they are w^ashed for two hours in a current of 
water. The proofs at times retain some particles of the salt ; the presence 
of which, however, in no degree alters its preservation, so long as they 
are completely free from the hyposulphite. This means is the simplest and 
best of the many that have hitherto been tried, since it does not require 
more than three hours and a half in place of the eight or ten hours that are 
generally employed in other processes, the result of which is often not very 
satisfactory.” 
Avxtrd of Medals. — The Photographic Society of Scotland have awarded 
the medals given annually by this society as follows Mr. H. P. Robinson 
(London) ; portraiture, for his portrait of “ Brenda.” Mr. Janies Mudd 
(Manchester) ; landscape, for his view of “ Dunham Park.” Mr. Thomas 
Aiman (of Glasgow) ; best view in Scotland, for his “ Dumbarton Castle.” 
Mr. J ohn Smith (Darnick Tower) ; best view by an amateur, for his picture, 
“ On the Leader near Melrose.” Mr. J. Ramsay L’Ainy (of Nether Byres) ; 
for the best gToup. Mr. Samuel Highley (London) ; for a series of micro- 
scopic objects enlarged for the magic lantern. The Pantoscopic Company 
(London) ; for panoramic views taken with the pantoscopic camera. Pew 
will question the justice of the various awards. 
The Copyright Question. — The piracy of engravings by photographers, and 
the fatal injury thus inflicted upon a branch of art deserving the gveatest 
encouragement, has been again before the public during the last three months, 
and it has been decided in one of the courts that the print-publisher’s usual 
mode of disposing of proofs before letters robs hmi of the legal remedy 
which the law otherwise awards. This is a very important decision, and one 
which strikes at the very root of engraving as a branch of the fine arts. 
Carbon Transparencies for the Magic Lantern. — Mr. Walter Woodbury, 
vdiose beautiful views of Japan are so well known, describes the following 
simple and effective process for obtaining these beautiful productions. Take 
a few sheets of talc about inches square, and place say 4 or 6 on a sheet of 
plate glass, 8 by 10, or 10 by 12, with their edges joined and surfaces damped, 
in order to make them adhere. A bichromated solution of gelatine, coloured 
as in Mr. Swain’s carbon process, only to a greater extent, is used. The 
sheets of talc being coated with this solution, are allowed to .drv. The 
talc is then taken from the glass and exposed to the negative, the gelatine 
side uppermost. When printed, wash in warm Avater, as in the carbon 
process above mentioned. 
