I have been trying numerous experiments in this line, and I think I have almost hit upon another and quite new and instantaneous process; but as it is only in embryo, I will not give it to you till perfect. There are of course many other substances to be yet mixed in the bath or the collodion, _e. g._ all the alkaloids, or indeed any of the deoxidating agents known, and probably with good results. I am still continuing my experiments on this head, and if I make any farther improvements I will lose no time in communicating them to you. Some negatives taken by this means were exhibited on Friday evening at the Royal Institution, and were much admired. F. MAXWELL LYTE. [By MR. LYTE'S kindness, who has shown us a number of the pictures taken by this new process, we {571} are enabled to hear our testimony to its beautiful results. We are glad to learn also, that there is a probability that the admirers of photography may soon be enabled to purchase specimens of the productions of this accomplished amateur, who is about to return to the Pyrenees for the purpose of securing photographic views of the splendid scenery and various objects of interest which are to be found there.--ED. "N. & Q."] _Photographs, &c. of the Crystal Palace._--All who have visited the Photographic Institution, in New Bond Street, must have admired the large photographic views of the Crystal Palace, from collodion negatives taken by MR. DELAMOTTE, who, combining the taste of the artist with the skill of the photographer, has succeeded in producing some most effective views of this new Temple of Education. At Lord Rosse's soirée on Saturday last, the closing one unfortunately of those most agreeable reunions, Mr. Williams exhibited three daguerreotypes, taken that morning, of the ceremony of opening the Crystal Palace, which, although only about three inches by five, contained some hundreds of figures. The portraits of the Queen and the brilliant cortege which surrounded her at the moment were strikingly effective. _Soluble Cotton._--In answer to the observations of H. U. (Vol. ix., p. 548.), I should imagine that the nitrate of potash used was not thoroughly dried; and consequently, the amount of water used was in excess of that directed. The temperature should be from 120° to 130° Fahr. And thermometers of a proper construction (with the lower part of the scale to bend up from the bulb) can be obtained in abundance at from 1s. to 2s. 6d. at several of the makers in Hatton Garden or elsewhere. GEO. SHADBOLT.