. Carnegie Institution of Washington publication. LIQUIDS AND ALUKD EXPERIMENTS. 47 33. Apparatus.—The construction of the apparatus is shown in fig. 15 in vertical section. Here//"'/'/is an inverted bell jar, with a ground edge at ff and a neck for a stopper at /'/'. This is closed with a brass lid, ee, and contains the charge of paraffin oil as far as the level ww. The plates of the condenser are shown at gg and hssh, hh being the guard ring and 55 the movable disk. In order that hssh may be nearly plane the inner circular edge of //// is turned as thin as possible (not shown). The plat
. Carnegie Institution of Washington publication. LIQUIDS AND ALUKD EXPERIMENTS. 47 33. Apparatus.—The construction of the apparatus is shown in fig. 15 in vertical section. Here//"'/'/is an inverted bell jar, with a ground edge at ff and a neck for a stopper at /'/'. This is closed with a brass lid, ee, and contains the charge of paraffin oil as far as the level ww. The plates of the condenser are shown at gg and hssh, hh being the guard ring and 55 the movable disk. In order that hssh may be nearly plane the inner circular edge of //// is turned as thin as possible (not shown). The plate gg is held by a rod aa (with a clamp screw on top), the latter fitting snugly into the hard-rubber cylinder, to which it may be fastened with a set screw. The cylinder bb is in turn held by a sleeve and set screw, axially and vertically at the center of the lid ee. Hence gg may be adjustably raised by any desirable amount, or lowered into contact with hh. In another form of the apparatus the rod aa, holding the disk, may be replaced by a p micrometer screw and stuffing box. The disk, ss, is floated on the Cartesian diver k of very thin brass tubing, to which it is soldered. The level of the liquid within is shown at v. Four adjustable bent wires II keep the float in position, concentric with the axis of the circular plates of the condenser, and also prevent its falling below a conve- nient level. The guard ring hh is supported by four strips of copper nn snugly fitting the inside of the bell jar. These are braced by a ring of metal mm, to which the strips nn are sol- dered. They terminate at the top of the tube pp, which is the lower electrode of the condenser, the clamp being at r. The tube pp finally is held in place by the perforated cork qq, all parts fitting tightly. In a fur- ther improvement of this apparatus, the guard ring is adjustable, being placed on three leveling screws, respectively, rotating with three springs. The wires // are also adjustable. The lid, fina
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Keywords: ., bookauthorcarnegie, bookcentury1900, bookdecade1910, bookyear1913
