[Bubier], Edward Trevert, 1858- [from old catalog] · Lynn, Mass., Bubier pub. co. · leaf 214
designed to give the greatestpower with the least weight, and by this means themachine is made quite light and can be easily trans-ported from one part of the mine premises to another. The qualities of durability, compactness, ease ofoperation and minimum of wear, so essential inmining work, have… … llilli ¥ i!lj.K RECENT APPLICATIONS. 213 frame of the hoist. The speed of the motor is con-trolled by a switch at one side, by means of whichthe motor can be made to vary its speed by a singlemovement of the switch handle. Turning the han-dle to one division will make the motor run slowly,through…
Electricity
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