United States or Saint Helena, Ascension, and Tristan da Cunha ? Vote for the TOP Country of the Week !
It will be readily seen that if an impressioned plate so covered is placed over the mercury, it will be developed on such portions only as are exposed. The principle is so familiar that further explanations are unnecessary. This subject is worthy the attention of every operator. The following process is so plain and easy of trial that any Daguerreotypist can try it. This is as given by Mr.
Again, should the impressioned plate be exposed too long over the vapor of bromine, the impression would be rendered wholly insensitive to the mercurial vapor.
"With the battery prepared as above, and the solution of sulphate of copper in a vessel of proper dimensions to receive your plate, connect the galvanic current, and immerse the impressioned plate, letting it remain until a thin film of copper has been formed, then the battery can be strengthened, and the impression will be of sufficient thickness to be removed in from eight to twelve hours.
And during the whole Trent affair, Lord Lyons's conduct was discreet, delicate, and generous. Events may transform Lord Lyons into an official enemy of the Union; but a mind soured by human meanness is soothingly impressioned by such true nobleness in a diplomat and an Englishman. Gen. Stone, of Ball's Bluff infamous massacre, arrested. Bravo!
Expose an impressioned plate, that has been sufficient time in the camera to become solarized, to the vapors of bromine, and the impression will be fully developed and exhibit no signs of solarization. The exposure over the bromine most be very brief. Chlorine or iodine will produce the same result. The latter is preferable.
Word Of The Day