Early Work In Photography
A Text-book For Beginners

76 Early Work in Photography. Dry Chemicals (continued). Approximate Cost] Potassium Carbonate 4 oz. s. 0 a. 2 Iodine ... ... ... I oz. I 2 Mercury Bichloride I oz. O 4 *Alum (ground) i lb. 0 2 Potassium Ferricyanide (red prussiate oi potash) 2 OZ. 0 6 Liquids. Sulphuric Acid ... ... 4 0z. 0 4 Acetic Acid... ... 4 oz. 0 8 Hydrochloric Acid ... ... 4 0z. 0 4 Pure Alcohol ... 8 oz. 2 0 Methylated Alcohol ... ... 16 oz. O 6 Uranium Nitrate Solution ... (= 20 grs. per oz.) 0 9 Gold Chloride Solution = i gr. per oz.) 2 0 Ammonia ... ... 4 oz. O 4 Apparatus, &c. Red Litmus Paper .'.. Blue „„ ... 1 book ... I booli 0 0 2 2 Filter Papers ... 100 1 0 Glass Funnel, 6 inch... ••• 1 0 6 2 oz graduate •••1 0 6 4 oz „ 0 10 10 oz „ - : ::: 1 3 Minim „ 0 6 Chemical Thermometer 3 0 2 oz Dropping Bottle 0 8 Scales and Weights... 2 6 Set of Decimal Weights Granitine Porcelain Trays of various sizes. 3 0 All the chemicals named in the foregoing list can be obtained from any reliable dealer in photographic supplies with the exception of the solutions of gold chloride and uranium nitrate; these must be prepared by the student Gold chloride is usually sold in hermetically sealed glass tubes containing 15 grains of chloride of gold and sodium; but the contents of most of the tubes are only equal to 7% grains of pure gold chloride. To make the stock gold solution we must put a few ounces of distilled water in a graduate and then drop in a tube of gold chloride; crush the tube with’ * Stored in a Stoneware jar. t Bottles extra.