Electrochemical and metallurgical industry . j_l,f;vl(K FOR ( ll \R(;iNr. S(()RIFIER BlTTONS INTO Cl IELS. strumcnt into the furnace, and when it is placed over the cupels, which have been properly aligned in the muflle, the upper plate is pushed forward to a stop-point, bringing the November, 1905.] ELECTROCHEMICAL AND METALLURGICAL INDUSTRY. 419 apertures of the two plates to register, thus causing the lead-buttons to drop <lo\vn into the cupels. The handle of the. FIG. 3.—CONVENIENT B.\TH. upper plate runs through guides fixed to the handle of thelower plate; both handles are co
Electrochemical and metallurgical industry . j_l,f;vl(K FOR ( ll \R(;iNr. S(()RIFIER BlTTONS INTO Cl IELS. strumcnt into the furnace, and when it is placed over the cupels, which have been properly aligned in the muflle, the upper plate is pushed forward to a stop-point, bringing the November, 1905.] ELECTROCHEMICAL AND METALLURGICAL INDUSTRY. 419 apertures of the two plates to register, thus causing the lead-buttons to drop <lo\vn into the cupels. The handle of the. FIG. 3.—CONVENIENT B.\TH. upper plate runs through guides fixed to the handle of thelower plate; both handles are connected by a spring, whichacts as a brake when the upper plate is pushed forward to dropthe buttons, and also serves to bring it back into its originalposition, in which the buttons cannot dropthrough the apertures in the lower plate. Charles Tookey^ first recommended the use ofhydrochloric acid () insteadof a brush for cleaning the buttons, and for thispurpose a small silver dish and tray having per-forated pockets give excellent satisfaction. Bythe use of this device fifty or more beads at atime can be treated, washed and dried withouttransfer. Fig. 3 shows a very handy parting-bath,which though old in principle has not been ingeneral use. The vessel is a constant-level waterbath, and the tray an ordinary test-tube silver beads to be parted are dropped intothe test-tubes, and the latter filled with dilutenitric acid of a strength of one
Size: 2006px × 1246px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, booksubje, booksubjectmetallurgy
