The chemical formula for producing the silver chloride on the paper may be thus stated: NaCl+AgNO3, AgCl+NaNO3. That is, sodium chloride and silver nitrate make silver chloride and sodium nitrate.
Those of our Camera Club who have prepared the plain paper after the formula given in this column will now understand the chemistry of the operation. The next paper will explain why the chloride is produced on the paper instead of simply coating the paper with the silver chloride.
The new chemical elements mentioned and their symbols and atomic weights:
| Atomic. | ||
| Symbol. | Weight. | |
| Silver (argentum) | Ag. | 107 |
| Nitrogen | N. | 14 |
Wm. Merritt, Rhinebeck, N. Y., Roy Pike, Lake City, Minn., Joseph K. Fornance, Norristown, Pa., D. M. Martin, Loveland, Ia., and Hulburt Marsh, Groton, N. Y., wish to become members of the Camera Club. Their names are enrolled on the list, and we welcome them to our club. We hope to have the pleasure of seeing some of their work very soon.
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