The whole proposition must originally have been a hoax: in fact, we live in a day when the masses of the people are easily induced to believe that _electricity_ can _do everything_. Another, and far more feasible plan has been proposed ("N. & Q.," Vol. viii., p. 413.), viz. to paste the paper to be split between two pieces of calico or linen; and when perfectly dry, part them. One half, it is said, will adhere to each piece of the linen, and may afterwards be obtained or set free from the linen by soaking. I have tried this with partial, but not satisfactory success. It will be remembered that the _results_ of the _true_ process were some years ago exhibited before a scientific company (I think at the Royal Institution), when a page of the _London Illustrated News_ was first exhibited in its usual condition, printed on both sides; and was then taken to an adjoining apartment, and in a short time (perhaps a quarter of an hour) re-exhibited to the company split into two laminæ, each being perfect. Neither the _pasting_ plan, nor the electrical gammon, could have effected this. I hope some of your readers (they are a legion) will confer on photographers the favour of informing them of this art. COKELY. _Curling of Iodized Paper._--The difficulty which your correspondent C. E. F. has met with, in iodizing paper according to DR. DIAMOND'S valuable and simple process, may be easily obviated. I experienced the same annoyance of "curling up" till it was suggested to me to damp the paper previously to floating it. I have since always adopted this expedient, and find it answer perfectly. The method I employ for damping it is to leave it for a few hours previously to using it upon the bricks in my cellar: and I have no doubt but that, if C. E. F. will try the same plan, he will be equally satisfied with the result. W. F. W. _How the Glass Rod is used._--Would you be kind enough to inform me how paper is prepared or excited with the glass rod in the calotype process? Is the solution first poured on the paper, and then equally diffused over it with the rod? DUTHUS.