IMPROVING THE MINERS' SAFETY LAMP
Interesting experiments havo recently been made by a British Government Committee on tho improvement of the gauge used on miners' safety lamps. Tho two points considered were safety and the improvement in tho light transmitted by tho gaugo. Nearly forty different kinds of gauges wero testa!, iirst in discs and then in tho ehapo adopted in tlie lamps themselves. With certain gauges it waH found that thn light conld be increased half as much again over that of tho standard lamp «'ithmit in safeW. ljearing in* mind that the miners' safety lamp was invented. _iii Great Britain by thn famous Humphrey" Davy about a oentury ago, and has been the moans of 6avine countless lives, it is romarkablo to find it still undergoing -rmprovomVnta in detail
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Dominion, Volume 14, Issue 68, 14 December 1920, Page 10
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131IMPROVING THE MINERS' SAFETY LAMP Dominion, Volume 14, Issue 68, 14 December 1920, Page 10
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