Erica will find his illustration of Campbell's Like Angel Visits anticipated in our 1st Vol.
J. N. C. (King's Lynn). We have one or two Replies on the same subject already in the Printer's hands.
A. J. V. (University Club) will find his Query respecting Solamen miseris, &c. in Vol. viii., p. 272., and an answer respecting Tempora mutantur in p. 306.
Our Correspondent C. E. F. (p. 373.) is informed—1. That both the solutions of the muriate salts and the nitrate of silver may be used in the manner he proposes; but a portion of sugar of milk, mannite, or grape sugar, as has been previously recommended, much accelerates the process. 2. The positives should be printed about one-third deeper than is required, and they should remain in the hypo. bath until the mottled appearance is removed, which is visible when held up against the light and they are looked through: at first the positive often assumes a very unpleasant red colour; this gradually disappears by longer immersion, when the proofs may be removed at the point of tint required, remembering that they become rather darker when dry, especially if ironed, and which is generally desirable, especially if the print is rather pale. 3. The sel d'or does not seem to have the destructive effect which the chloride of gold has, and if the chemicals are entirely removed, in all probability they are quite permanent. Those which we have seen printed several months since appear to have suffered no change. Pictures produced by the ammonio-nitrate are most uncertain. There are few who have not had the mortification to see some of their best productions fade and disappear. A learned professor, about eighteen months since, sent us a picture so printed "as something to work up to;" a few yellowish stains are now all that remains on the paper.
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