ction apparatus being with oil, grease, and wax, by coating them concealed from the spectators, who occupy a with India rubber, or by treating them with room lighted by two large windows. Ex- ammoniacal solutions of copper. The first cellent results were also obtained when the process is applied to… … Fig 4.- Poch's apparatus for demonstration* Fig. 3.—Moving pictures visible in daylight. and then, immersed in a 7 to 9 amperes per square fixing bath containing meter (about 11 square soap, which forms in- feet) is required, accord- soluble lime or alumina ing to the inventor, and soap in the…
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