. Journal . 1. Anode IScpt. 30,1903.] JOURNAL AND PATENT LITERATURE.—Ol. XXII. & XXIII. 1065 thode is made of platinum ganze, which is held rigid,~ means of a platinum-iridium (10 percent, of iridium)ame, 6 cm. high and 43 cm. wide. The frame, which isughened by means of a sand blast, has a stout piece ofdium-platinum wire, 7-5 cm. long, welded on to it. with aop, 2 ■ 5 cm. from the end, for hanging the electrode on thelance. The total cathode surface is 50-4 sq. cm., or. Fio. 3. approximately 3 sq. dcm. In many cases sheet platinummay be used in place of platinum gauze, but for m
. Journal . 1. Anode IScpt. 30,1903.] JOURNAL AND PATENT LITERATURE.—Ol. XXII. & XXIII. 1065 thode is made of platinum ganze, which is held rigid,~ means of a platinum-iridium (10 percent, of iridium)ame, 6 cm. high and 43 cm. wide. The frame, which isughened by means of a sand blast, has a stout piece ofdium-platinum wire, 7-5 cm. long, welded on to it. with aop, 2 ■ 5 cm. from the end, for hanging the electrode on thelance. The total cathode surface is 50-4 sq. cm., or. Fio. 3. approximately 3 sq. dcm. In many cases sheet platinummay be used in place of platinum gauze, but for metallicdeposits which have a tendency to exfoliate, such as bismuthand antimony, the gauze is more satisfactory, and it is alsobetter for mercury and for peroxide deposits. The weightof the cathode when made of sheet platinum should beabout 14 5 grms., and when made of gauze (not riner than=0—60 meshes per sq. cm.) about 15 iThese electrodes are cheaper than basins or cylinders andare more easily manipulated when electrolytic separation-are being carried out. Rotating Electrodes.—Fig. 2 shows a form of rotatingelectrode which can be driven either from a horizontal orvertical pulley and may also be used for working severalapparatus in series. A spindle passes through a hole inthe gun-metal supporting arm, and carries a small chuck(such as is used for fixing <mall drills on a lathe), in whichthe rod of the electrode is held. The grooved pulleywhich is fastened on t
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectchemist, bookyear1882
