. Bulletin. A. CONVENIENT RESISTANCE FOR EXPERIMENTAL WORK. 20 lamps in parallel, either 8, 16, or 20 candlepower as desired. Any number may be cut out as B. PERVIOUS CHARCOAL CATHODE, SHOWING CRYSTALS OF FINE SILVER ONCHEESECLOTH FRONT COVER. DESCRIPTION OF AN EXPERIMENTAL PLANT. 143 is shown at e. At / is the cover of a compound pervious electrode,md behind this is seen the box itself filled with excelsior charcoalready for use. The Acheson-graphite anode is shown at a. In therear of the apparatus is a pan filled with excelsior charcoal as itomes from the retort. The two bottles, j
. Bulletin. A. CONVENIENT RESISTANCE FOR EXPERIMENTAL WORK. 20 lamps in parallel, either 8, 16, or 20 candlepower as desired. Any number may be cut out as B. PERVIOUS CHARCOAL CATHODE, SHOWING CRYSTALS OF FINE SILVER ONCHEESECLOTH FRONT COVER. DESCRIPTION OF AN EXPERIMENTAL PLANT. 143 is shown at e. At / is the cover of a compound pervious electrode,md behind this is seen the box itself filled with excelsior charcoalready for use. The Acheson-graphite anode is shown at a. In therear of the apparatus is a pan filled with excelsior charcoal as itomes from the retort. The two bottles, j /. in the foreground con-tain silver residues from the clean up and show the material as itappears after roasting. Plate III. B. from a photograph taken in the old mining buildingat the University of California, shows the means of regulating thecurrent. The laboratory is provided with a 110-volt direct currentfrom a storage batten- or from a dynamo. This current is broughtinto the laboratory at a, the main current passing through the resist-ances ru r2, and r3. By connecting with varying points on this re-sistance, a shunt is formed with any desired voltage
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectminesandmineralresou
