The skin, its care and treatment; teaching every detail of this important work in a simple, concise and practical manner . a financialpoint of view. Before attempting to charge and use a zinc-carbon,bichromate, fluid battery the beginner will do well to heedthe following directions: It is quite as necessary to knowhow to make the fluid and fill the cell as it is to make theproper connections and proceed with the work. Much diffi-culty may be avoided by sufficient care in mastering thesepreliminary details. The battery fluid is best made by means of the followingdirections. To make the battery
The skin, its care and treatment; teaching every detail of this important work in a simple, concise and practical manner . a financialpoint of view. Before attempting to charge and use a zinc-carbon,bichromate, fluid battery the beginner will do well to heedthe following directions: It is quite as necessary to knowhow to make the fluid and fill the cell as it is to make theproper connections and proceed with the work. Much diffi-culty may be avoided by sufficient care in mastering thesepreliminary details. The battery fluid is best made by means of the followingdirections. To make the battery fluid: IJ—Sulphuric acid (com-mercial), 3 fluid oz.; powd. bichromate of soda, 3 oz.;water, 16 fluid oz.; bisulphate of mercury, 2 drachms. Dis- THE SKIN. 129 solve the bisulphate of mercury in the water; then add thebichromate of soda. Slowly pour in the sulphuric acid andstir until the ingredients are dissolved, then allow the liquidto cool, as the mingling of the acid and water produces heat,and if the mixture is used when warm it injures the bat-tery. The bisulphate of mercury keeps the zincs well Figure 1. Figure 2. Fig. I shows the hard rubber plate of a section (on theunder surface of which is cemented a sheet of soft rub-ber). The binding posts which project through thehard and soft rubber screw into the brass piece holdingthe zinc and carbon couples. The rubber plate on whichthe couples are clamped projects over on one side enoughto cover the cells when the zinc and carbon plates are placedin the drip cups. When the cells are not in use and the lidof the battery box is closed, it presses on the spring handleof the section (Fig. i) and holds the soft rubber firmly overthe cells and drip cup. By this arrangement the hydrostat ismade water-tight. 130 THE SKIN. Fig. 2 shows a section of six cells and a drip cup madeof one piece of hard vulcanized rubber. The drip cup is toreceive the zinc and carbon couples when not in use. By the aid of a simple current s
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Keywords: ., bo, bookcentury1900, bookdecade1900, booksubjectskin, bookyear1904
