R. The print of a bishop burnt in Smithfield cannot be identified without a sight of the engraving.
G. D. For the origin of Plough Monday, see Brady's Clavis Calendaria, vol. i. pp. 160-162.; and Brand's Popular Antiquities, vol. i. pp. 505-508. (Bohn's edition).
A Communication from Dr. Diamond on the manufacture of collodion, and also a very interesting one from Mr. J. Maxwell Lyte, in our next Number.
Anonymous Photographic Correspondent. We have given in former Numbers admirable formulæ for printing positives. Mr. Pollock's mode on albumenised paper produces beautiful results, as does also the more simple one recommended by Dr. Diamond. In one of our earliest Photographic communications an iodized form was given which may be used by feeble or artificial light, and which is highly useful.
A. R. (Bombay). Iodide of silver should not be dried for photographic purposes after it is formed; therefore you must rest contented to approach the nearest you can to the requisite quantity by careful manipulation. A note appended to our photographic article in this Number sufficiently indicates how often we must depend upon our own judgment, and how difficult it is to reduce Photography to exact laws when the substances used are so constantly varying.
T. M. The sample sent of Whatman's writing-paper iodizes most beautifully. It has always been the case that paper made for ordinary purposes is often much better than that made for Photography alone.
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