Gurney has recently taken some of the finest large size Daguerreotypes ever produced. These wonderful specimens are on plates eleven by thirteen inches, called mammoth plates. Such pictures four or five years ago would have filled the world with admiration and surprise. The chemical effect is clear and well worked, thus proving well prepared plates can present large as well as small impressions. It is well worth while for every Daguerreian visiting this city, to look upon these proud specimens of the art. * * * * * Thompson of this city, has just taken the whole of the upper floor of the building occupied by him, and has built two fine sky-lights. * * * * * We understand that Mr. H. McBride, operator for Meade & Brother of this city, is about to establish himself in Albany. We wish Mr. B. success. * * * * * Weston of this city, is now producing some of the best Calotypes we have seen. We are happy to see Photographing on paper brought before the public. Daguerreotypists should call and see Mr. W's. specimens, as well also those produced by Messrs. Bertha, Wehnest, Beekman & Brothers, who have been for some time past successfully practising in the art of "Sun Drawing." * * * * * A. Morand has recently made very extensive additions to his former establishment in Chatham street. We now find him lighting his subjects by a large and well arranged sky-light. * * * * * Correspondence. S. D. Humphrey, Esq., Dear Sir:--I would fain give my testimony in favor of your excellent Journal, which is to the Daguerreian, as a guide to the traveller, and pilot to the untaught mariner. It needs but to meet his eye for him to appreciate its value and secure its aid, while following in his misty pathway. I have long since learned that "experience is the best teacher," but now since the advent of the Journal, all who would be relieved of difficulties incident to Daguerreian life, may find the cause of _atmospheric troubles--bad light--poor subjects--clouded results_, &c., reflected on its pages, and thus, by close application, prevent the many evils which so frequently attend them, and thereby learn that "an ounce of prevention is better than a pound of cure." But there are those in the business who do not seem to discover any difference between the profile on the school-boy's slate, and the best "aqua-tinta" engraving. _They_ never have any trouble in producing _perfect_ results at _every_ sitting, and _that_ for the sum of one dollar or fifty cents. No wonder the writer of the article on Daguerreotypes in No. 5 of the Journal, says "_Daguerreians_ are not _artists_, nor Daguerreotypes works of _Art_, but _mere wonders of Nature_."