. Mechanical appliances, mechanical movements and novelties of construction; a complete work and a continuation, as a second volume, of the author's book entitled "Mechanical movements, powers and devices" ... including an explanatory chapter on the leading conceptions of perpetual motion existing during the past three centuries. 706. MINING LAMP. Clanny glass takes the place of the lower partof the wire gauze in the Davy lamp andthus gives a clear light from the air enters through the lower part ofthe wire gauze chimney, as shown by thearrows in the section. English. An impro
. Mechanical appliances, mechanical movements and novelties of construction; a complete work and a continuation, as a second volume, of the author's book entitled "Mechanical movements, powers and devices" ... including an explanatory chapter on the leading conceptions of perpetual motion existing during the past three centuries. 706. MINING LAMP. Clanny glass takes the place of the lower partof the wire gauze in the Davy lamp andthus gives a clear light from the air enters through the lower part ofthe wire gauze chimney, as shown by thearrows in the section. English. An improvement on the Davy 707. MINING LAMP. Mueselertype. A strong glass cylinder aroundthe flame section. A central metallicchimney d, arranged to separate the in-coming air at a through the wire gauze,while the products of combustion pass upthe central chimney. By this arrangement the flame is fedwith purer air than when the centralchimney is not used. 273 274 MINING DEVICES AND APPLIANCES. I 708. WELL-BORINGTOOLS, a, plain drivingdrill; b, broad-edge drill; c,cross-blade drill. 709. WELL-BORINGTOOLS. Grab bits andtongs for drawing out losttools and obstructions.
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Keywords: ., bookauthorhiscoxgardnerdexter18, bookcentury1900, bookdecade1910
