1562
MINERALS YEARBOOK, 1941


M
Madagascar, flake graphite, import controL  1529
Magnesia, production, from dolomite 1504
  from magnesium silicates 1504
 refractory, manufacture, from sea water and
     dolomite 1497
  new sources  1502
Magnesite, demand, for war program 1498
 mines, mills, and prospests, map 1500
 prices  1502
 production  1498,1499
 sales  1498,1499
 salient statistics  1499
Magnesite industry, annual review  1498
 legalaction  1501
Magnesium, consumption  750
 foreign trade  753
 manufacturing processes  745
 prices.  752
 primary, production  743,744,754
 priority control  507,752
 producers, list  749
 production, capacity  745
  expansion program  752
 salient statistics  743
 secondary consumption  508
  recovery  493,507,749
  stocks  508
 technologic developments  753
 war aspects  752
Magnegium carbonate, data  1506
Magnesium chloride, as source of magnesium
 metal 1507
dat&  1506
electrolysis, for manufacture of magnesium... 745,
  746
saline deposits as source  1506
Magnesium compounds, annual review~ 1497,1498
 prices 1508
 recovery from sea water patents 1508
Magnesium industry, annual review 743
Magnesium metal, calcium chloride as sourc& 1509
 magnesium chloride as source 1507
 magnesium sislfate as source 1507
Magnesium oxide, data 1506
Magnesium powder, fabrication methods, de
     velopment 753
Magnesium products, manufactures 751
 manufacturers, list 752
Magnesium silicates, as source of magnesia~ 1504
Magnesium sulfate, as source of magnesium
 metal 1507
 data 1506
 in manufacture of plaster 1508
Magnetite, as source of titanium 805
 titaniferous, vanadium in, occurrence - 636
Maine, minerals, production 9,13,25
 slate, data 1267,1268
Manganese, in dust, toxic effects 587
 metallurgy, review 595
 salient statistics 584
 war program, Bureau of Mines 583.
Manganese industry, annual review 583
Manganese ore, beneficiation, Bureau of Mines 584
 consumption 594
ferruginous, consumption 596,599
 shipments 584,588
foreign trade 584, 585, 593
Government purchases 585
43overnment specifications 585
prices 599
 shipments 584,585,587,588,589,600
 stocks 594
Manufactured gas, sales 917
Marble, sales 1226,1229,1233,1249
Marble quarries, accidents 1546
 men employed 1540,1546
Marcasites, foreign trade 1521
Marl, calcareous, sales 1309
Maryland, asbestos, data 1429
bituminous-coal industry, data 817,
824, 826, 829, 830, 831, 832, 833, 834, 840, 841, 842, 852, 8.55, 856 ,8,58,
860, 862, 873 888.
coke industry, data.  951,
954, 95.5, 957, 985, 960, 961, 962, 963, 96,5, 966, 968, 969, 972, 974, 976,
981, 982, 98.5, 993 ,994, 995,996.
 Page
Maryland, minerals, production 9,13,26
 potash, review 1457
Masonry cement, data 1191,1192,1212
Massachusetts, coke industry, data 951,
 954, 955, 957, 958, 960, 961, 963, 965, 966, 969,
 972, 974, 976, 981, 982, 984, 993, 994, 995, 996.
granite, sales 1232
manganese ore, data 588,589,590
mmerals production 9 13 26
Medicinal oil, production 1109
Mercury, Bureau of Mines explorations, Strategic Materials Act          
 
consumption  690
foreign trade ~ 697
control -         687 Geological Survey explorations, Strategic
 Materials Act                import control by Office of Production
    Management  687
price  686,689
price control  687
production  686,692,699
purchases, Metals Reaerve Co  687
salient statistics                   
stocks  691
stock-pile purchases                surplus supplies, agreement with Mexican
 Government, to obtain 687
 use, conservation 687
Mercury industry, annual review 685
Mesothorium, uses 804
Meta-arsenite, cupric, manufacture, patent~ 736
Metals mmor annual review 793
 production, review 3,51
Metal mmes miscellaneous accidents 1546
 men employed 1540,1545
Metals Reserve Co., agreement with Peru,
 to purchase strategic minerals. xxv
contract with Bolivia, to purchase. tungsten xxv
contract with Brazil, to purchase all mineral
    output . xxiv
contract with Mexico, to purchase all mineral
    output xxiv
functions xxi
imports, control, graphite 1529
negotiations, to buy mineral output of
    Argentina and Chile xxv
specifications, manganese ore 585
purchases. See Aluminum; Antimony;
    Bauxite; Chrome ore; Copper; Mer
    cury; Tin; Tin ore; Tungsten.
stimulation of mineral production, by contract orsubsidy         . xxiii
stock-pile purchases  xxii
strategic metals, purchase, in truckload lcts_ xxiii
Mexico, antimony, review 767,769
arsenic, production 737, 738
bismuth, data 741
cadmium, data  781
copper, production 117,120
fluorspar, data 1415
gold, review 78,79
lead, review 137, 138, 139, 141
magnesite, deposit 1502
manganese ore, data 600,601
mercury, review 686,687,697,700, 701
surplus supplies, agreement with United
    States~~ 687
mineral output, Metals Reserve 0o. con
    tract to purchase xxiv
oil properties, expropriation, settlement. - - - 1028
 silver, review 80,89
 sulfur, data 1364, 1366
 tin, data 720,721, 728
 zinc, review 159, 163
Mica, as strategic mineral, supply 1465,1466
 built-up, production 1476
 consumption 1471,1471
 defense aspects 1465
 domestic, quality 1469
 foreign trade 1466,1474,1478
 ground, production 1469,1470
 preparation 1473
 prices. 1477
 salient statistics 1466
 scrap, production 1469, 1470