File:Factory and industrial management (1891) (14577570000).jpg

Identifier: factoryindustria15newy (find matches)
Title: Factory and industrial management
Year: 1891 (1890s)
Authors:
Subjects: Engineering Factory management Industrial efficiency
Publisher: New York (etc.) McGraw-Hill (etc.)
Contributing Library: Engineering - University of Toronto
Digitizing Sponsor: University of Toronto

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50 94 120 950 97 200 1050 96 50 950 95 50 900 95 80 1000 94 160 1088 96 60 1050 40 1250 96 120 930 97 280 1250 95 100 1000 95 100 1050 95 tjf^r. 8i n 8i 8i8 8^8 <■=:.- 4i4i to 5ito 46 \ to 9^7 to 8 5 to 7 2^4i 3 4 to 5 6i to 7 J zl •43 700 .01 700 • 97 .38 700700 .75 • 38 • 75 700700600 • 75 600 ■ 34.28 500600 .21 600 .60 800 600 ■ 49.62 600500 o S 3^509.58 8.134.295.022.76 2 4.00 2 9.7412 8.64 1.888.34 11.081.842 MINE. City iV .Suburban i .• ■ t Dies Crown Reef. . . ,OeldenJjuis Deej), ShoesDies Shoes (. I I )ies Meyer cV Charlton ■ New (oint-t I Simmer c^ Jack J ShoesDies ShoesI )i<-s ShoesDies Metal worn per ton of ore crushed. Cost per ton of ore crushed. 0/.8.10 pence. 1-75 350 • 75 8.002.80 i^37.60 9 42 1.61 6. lo 1.32 12.80 2.20 4.20 ■ 91 11.00 1.89 6. u 1-43 8.483.84 I2.60 Oca_ 1 O • pence.(2.50 1.97 2^93 (« ^o £ 3 II 3322. 601 ■ 24 .42■ 24 o o O 3 pence..44 24 .7740 ^ a (LI <U hours.36 to 38 ()0 46 72 MINING ON THE WITWATERSRAND. 411
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CHAIN SORTING BELT, MEYER & CHARLTON G. M. CO. batteries both back plates and chuck plates are used, but the formerare the most common. In some mills lip and splash plates are used.Apron plates are from 10 to 12 feet long and from 4^ to 5 feet wide,and incline from i inch to i ^ inches to the foot. Sometimes they arebroken, but usually continuous. Back plates are from 7 to 11 incheswide, and chuck plates from 3 to 6 inches. The copper plate usedis from \ to -f^ of an inch thick. They are rarely silver plated, and,when a new mill starts up, considerable time elapses before the platescease to absorb large amounts of gold. One of the points of great difference in the Rand Mills is in thearrangement of the line shafts. These are either coupled directly tothe mill engine or driven by rope-transmission. The latest millserected by the Rand Mines, Limited, employ direct coupling withthe engine at one end. The new Simmer & Jack Mill uses rope-transmission with two line shafts, one for

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