The sciopticon manual : explaining Marcy's new magic lantern, and light, including magic lantern optics, experiments, photographing and coloring slides, etc. (1874)
Marcy, L. J., author · Philadelphia : L.J. Marcy · leaf 186
ce of light should be drawn farther from the condensing lenses. A very interesting addition to the microscope consists of a diagonal mirror, whereby the image of the objects, instead of being projected directly on an opaque screen, may be thrown down at right angles on a sheet of paper placed on a… … Fig. 48. for showing the circulation of the blood in a tadpole’s tail, of the sap in plants, &c. Its price, without the bottles, is $5.00. A tank filled with a solution of alum is sometimes used to absorb much of the heat of a beam of light before it falls upon a delicate microscopic object.
Lantern projection · Slides (Photography)
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
![An illustration from The Telegrapher [microform] (1864)](https://img.insideoutlibrary.com/img/200/ia-telegrapher04nati-268-117.webp)
