. Archives of physical medicine and rehabilitation . d whichis rigidly attached to the heavy metalframe. A mercury-sealed three-waystop-cock (24) facilitates the connec-tion of either unit with the vacuumpump. PURIFICATION OF RADIUM EMANATION—WHITTEMORE Metal tubing for the frame of theapparatus possesses several advantagesover the customary angle-iron superiority lies chiefly in its greaterrigidity. In this installation all electricwires have been concealed withm thehollow tubing, thereby eliminating the usual unsightly separate conduits, oropen-wiring. Wherever wires extendthrou
. Archives of physical medicine and rehabilitation . d whichis rigidly attached to the heavy metalframe. A mercury-sealed three-waystop-cock (24) facilitates the connec-tion of either unit with the vacuumpump. PURIFICATION OF RADIUM EMANATION—WHITTEMORE Metal tubing for the frame of theapparatus possesses several advantagesover the customary angle-iron superiority lies chiefly in its greaterrigidity. In this installation all electricwires have been concealed withm thehollow tubing, thereby eliminating the usual unsightly separate conduits, oropen-wiring. Wherever wires extendthrough the frame, as for example, nearthe copper coils and back of the switch-board, standard porcelain condulets arethreaded directly into the tubing. All electrical controls are assembled on one switchboard within easy reachfrom either side of the apparatus. Asmall pilot lamp at the top of the switchpanel is lighted while the current ispassing through the coils and serves toremind the operator to switch off thecurrent before leaving the
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Keywords: ., bookauthoramerican, bookcentury1900, bookdecade1920, bookyear1920
