and engineering journal . Closed. I DampDustInflammable GasRough usageNoise Powerful (1600 Ohm) Watertight SIEMENS BELL. Very powerful handGENERATOR. Bare, tinned, copperinternal CONNEC-TIONS. Loud speakingRECEIVER CORD speciallyreinforced here Highest quality Very efficientrenewable CAP-SULE TRANS-MITTER. Wide, Machine-faced jointsdamp, dust and flame proof 3 separate compartments for:— (1) Telephone. (2) Line terminals. (3) Battery. Increases strength. Decreasesmaintenance. Open. The above is pattern No. 10. Another—No. 10a—is equipped with two receivers. Representative
and engineering journal . Closed. I DampDustInflammable GasRough usageNoise Powerful (1600 Ohm) Watertight SIEMENS BELL. Very powerful handGENERATOR. Bare, tinned, copperinternal CONNEC-TIONS. Loud speakingRECEIVER CORD speciallyreinforced here Highest quality Very efficientrenewable CAP-SULE TRANS-MITTER. Wide, Machine-faced jointsdamp, dust and flame proof 3 separate compartments for:— (1) Telephone. (2) Line terminals. (3) Battery. Increases strength. Decreasesmaintenance. Open. The above is pattern No. 10. Another—No. 10a—is equipped with two receivers. Representatives in South Africa A. J. G. SIMPSON, , African Life Buildings, 85, St. Georges St.,CAPETOWN. G. 9-10, Cotts Buildings, Rissik and Fox Sts.,JOHANNESBURG. Box 239 Capetown. Telephone : 1202 Central. Bos 7404 Johannesburg. Telegrams : SIEMENS. Telephone : 408 Central. J burg, December 31, 1921. THE S A. MINING AND ENGINEEBING JOURNAL. 609 Deep Mining: Problems and Achievements. THE WORLDS DEEPEST MINES CHAMPION REEF. VILLAGE DEEP AND ST. JOHN DEL REY^TURFSHAFT BEING SUNK TO THE THIRTY-THIRD LEVE L WORKING CONDITIONS AT 6,200 FEET COSTSOF WORKING CONTRASTED THE CITY DEEP PROSPECT THE RANDS DEEPER LEVEL FUTURE DEPENDENT ON OPERATING
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Keywords: ., bo, bookcentury1800, bookdecade1890, booksubjectmineralindustries
