. The silver sunbeam : a practical and theoretical text-book on sun drawing and photographic printing. verypretty, and very largely used. Figure 55 is the Graphoscope. This is a highly orna- DESCRIPTION OF APPARATUS. 571 mental instrument for the exhibition of large, single por-traits and pictures. It is made in four sizes. Figure 56 is a cut of the Holmes Stereoscope. Thoughonly a skeleton, it proves to be the most perfect instrumentof its kind. It is made in a great variety of styles, somefolding up into a small compass. (See Figs. 60 and 61.) Figure 5T is the ordinary Revolving Scope. It is
. The silver sunbeam : a practical and theoretical text-book on sun drawing and photographic printing. verypretty, and very largely used. Figure 55 is the Graphoscope. This is a highly orna- DESCRIPTION OF APPARATUS. 571 mental instrument for the exhibition of large, single por-traits and pictures. It is made in four sizes. Figure 56 is a cut of the Holmes Stereoscope. Thoughonly a skeleton, it proves to be the most perfect instrumentof its kind. It is made in a great variety of styles, somefolding up into a small compass. (See Figs. 60 and 61.) Figure 5T is the ordinary Revolving Scope. It is made inimitation rosewood and black walnut, and holds from thirty-six to one hundred paper views. No. 58 is the Beckers Stereoscope. It is very elegant andsubstantial in appearance, and is adapted either for paper ortransparent views. No. 59 is the Beckers Stereoscope on stand. These willhold from one hundred to three hundred paper views. Figure 60 is the New Patent Folding Scope, after theHolmes pattern, which folds into small space. Figure 61 is the New Patent Folding Scope as folded. Fig. 26 CHAPTEE LXVIII. ON THE EEREOTYPE PLATE. As the business of making pictures upon japanned ironplates is extensive, and is constantly increasing, it may notbe considered out of place to occupy a short space in givingsome account of the present position of the industry of makingthe plates. The first person to introduce this article for photographicuse was Mr. Peter Neff, of Cincinnati. As some of the prin-cipal houses in the business of supplying photographic ma-terials were at that time largely interested in the manufac-ture of daguerrotype plates, the introduction of the picturesmade by means of collodion was strenuously opposed by our Mr. E. Anthony, who was always ready to encourageanything which tended to promote the interests of photogra-phy, and who, perceiving the great importance of the dis-covery of the use of collodion on the future of photography,had encouraged in
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