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 70
so have a closer semblance to a rapid veg¬ etable growth. A neutral solution of the terchloride of gold will give a characteristic growth upon a piece of zinc, but the solution should be quite weak. Salts of copper will give nodular forms upon zinc, if very dilute, and a dense fringe of black… … by a‘ button (d), or otherwise, and held firmly in place, ocure a pocket tuning-fork, either an A or a C, and
Light · Magic Lantern
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