The art of projecting. A manual of experimentation in physics, chemistry, and natural history with the porte lumiere and magic lantern. (1892)
Dolbear, A. E. · Lee and Shepard · leaf 169
J54 THE ART OF PROJECTING . slightly acidulated by the addition of a little sulphuric acid. I he terminals of the wires in the water are usually made of strips of platinum to prevent other chemical reactions from taking place. For projection, an excellent way is to insert two test-tubes filled with… … shown in Fig. hi. When the cju^rjjhs sent through these wires the bubbles will rise Qgjidly and soon fill the hydrogen tube. This tan&g of course to be pro¬ jected in the ordinary way^rthfer with lantern or porte lumicre, in which case^t-he bubbles will appear very large and the water ^vffl^tpjbear…
Light · Magic Lantern
Internet Archive · Public domain (published before 1931). Free to use for anything.
