Miller, Kempster Blanchard, 1870-1933 · New York : McGraw publishing company · leaf 587
- in one respect; the tableand its inclosing panels serve to enhance any noise that may be madeby the machines, and for obvious reasons they should run as quietly … 40S,—CHARGING MOTOR GENERATOR—AtTERN.MIXG-CURRENTMOTOR. as possible. A better practice is to build up a pier of brick from thefloor of the power room and to provide this! with a heavy slate top.This tends to greatly reduce the amount of noise of the machines, 566 AMERICAN TELEPHONE PRACTICE. and…
Telephone
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