CHAPTER XII.--MISCELLANEOUS APPARATUS 294

MAKING A ROTARY GLASS-CUTTER -- TO SMOOTH GLASS EDGES -- CUTTING HOLES IN GLASS -- ANTI-HUM DEVICE FOR METALLIC LINES -- A REEL-CAR FOR WIRE -- INSULATORS -- JOINTS AND SPLICES -- “GROUNDS” -- THE EDISON ROACH-KILLER -- AN ELECTRIC MOUSE-KILLER