Chicago : [Popular Engineering Pub. Co.] · leaf 729
" but after all much depends on the skill and judgment of the men in front of the switch board. The switchboard work, important as it is, is but one phase of the illuminating responsi- bilities incident to a grand opera production. On the stage, on specially constructed plat- forms elevated… … for moonlight, etc. In order to simplify the SWITCHBOARD OF THE NEW BOSTON GRAND manipulation of these colored lights the levers OPERA HOUSE, BUILT AT A COST OF $26,000 of the switches on the big board are painted
Electricity
Internet Archive · Smithsonian Libraries · Public domain (published before 1931). Free to use for anything.
