The sciopticon manual, explaining lantern projection in general, and the sciopticon apparatus in paricular (1877)

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iv PREFACE. the various interesting portions of the Magic Lantern Held in general, as well as to the Sciopticon in particular. It treats of the Optical Image—without a lens, with a lens, in the camera obscura, in the eye, in the photo- graphic camera, and on the screen ; of the peculiarities of lenses, and the corrections required hy lenses; of the peculiarities of the Sciopticon, and its construction and management; of dissolving views, phantasmagoria, and the ghost; of lantern slides in all their variety ; of photo- graphing slides by the wet-plate process, b}^ the dry-plate process, by Marcy's Photographic Printing Apparatus, by the Sciopticon, and other processes; of how to paint slides, and of ho\v to perform chemical experiment- to which is appended a catalogue, arranged to assist purchasers in making satisfactory selections. Thus this Manual may take the place of private cor- respondence to a considerable extent, allowing in let- ters more space for business, and tor an interchange of new ideas, with a view of making the Manual in subse- quent editions more interesting, and the Sciopticon more useful. It was at first my intention to give space to the sub- ject of chemical lights, but reflect ing that in this direc- tion there is no lack of printed matter, and that the in- terest felt in the Sciopticon is owing mainly to its giving