Mineral Technology and Output Per Man Studies, Issues 6-9

Front Cover
Works Progress Administration, 1938 - Mineral industries
 

Selected pages

Contents

57
37
National trend downward 19101934
40
Yield diluted by lowgrade porphyry ores
46
Trends in percentage of total copper ore
47
Technology cannot improve ore tenor
53
17
54
Regional character of lead and zinc production
60
19
61
Coeur dAlene region Shoshone County Idaho
67
Shift of production and yield of zinc for areas
75
APPENDIX CHARTS
85
Figure Page
3
65
9
A10 Production of ore and yield of metals per ton
10
A18 Production of ore and yield of metals per ton
16
Figure Page
19
B1 Average annual prices for silver copper lead
25
Chapter
xi
Figure
4
Typical pit operation at a Florida landpebble mine
12
30
15
17
17
Approximate location of the principal phosphaterock
20
68
21
Typical Florida landpebble washing plant during
26
32
32
B1 Output per man per day in selected States
36
Trends in production employment and output
41
73
48
54
54
21
56
Concentration of production
61
74
63
Y SOME EFFECTS OF TECHNOLOGICAL AND OTHER CHANGES
68
29
73
V1 OUTLOOK FOR FUTURE EMPLOYMENT AND OUTPUT
77
Beaver County Utah 18801935
106
Table Page
111
79
116
Table
9
3
B25 Salient statistics showing performance of Group
35
Unloading stone at the crushing plant
57
11
67
Vibrating screen
75
Output per manhour at 55 large limestone operations
90
16
91
Table Page
108
Distribution of 56 large limestone operations
116
118
118
Output per manhour at 53 large limestone operations
120
A1 Crushed stone and gravel sold or used by producers
133
2
139
A11 Employment production and output per man at
150
A12 Employment production and output per man at
158
A13 Employment production and output per man at
161
A17 Employment production and output per man at 24
167
Chapter
xiv
TEXT TABLES
xviii
Yield and shifting production in the Joplin
xxvi
Figure
3
55
75
Depletion of reserves
80
A RESULT OF SPECIAL RESOURCE
87
18
94
War stimulus to strip mining
96
19
106
Probable future significance of strip mining
108
HISTORY DESCRIPTION AND PRESENT DISTRIBUTION
114
20
120
Duckbills selfloading conveyors
123
23
126
27a Trackmounted gatheringtype mobile loader
134
Sales of loading equipment in 1938
139
Illinois county distribution of tonnage mined
149
Bituminouscoal production in Indiana by county
151
Kansas
156
Coal fields of the Appalachians
163
32
166
BASES FOR ANALYZING PERFORMANCE OF MECHANICAL
176
Number of commercial bituminouscoal mines
179
Shifts from old to new mining areas
185
Indexes of output per manday and per manhour
190
Days operated per year
204
B27 Comparison of number production and tonnage
205
Central Pennsylvania
210
Comparative significance of area data
212
Production
218
Men employed
244
Tons per manhour and number of men required
245
PERFORMANCE OF MECHANICAL AND HANDLOADING MINES
253
Tons cut by machine
254
Days operated per year
260
Days operated per year
269
43
271
50
278
Western Pennsylvania and Ohio No 8 field
292
51
293
53
299
Tons per manhour and number of men required
309
Labor output and labor requirements in selected
321
11
353
301
358
253
362
B10 Percent of bituminouscoal production mined
370
B17 Bituminouscoal production and tonnage mechanically
376
256
377
B22 Comparison of number production and tonnage
382
Tons per manhour and number of men required
384
260
387
B28 Growth of mechanical loading in Indiana by types
389
B33 Comparison of number production and tonnage
395
263
396
B38 Growth of mechanical loading in Montana by types
401
268
402
269
409
B47 Salient statistics showing performance of Group
411
Number of mines
416
Ohio 191835
418
B57 Number production and tonnage mechanically loaded
424
B62 Comparison of number production and tonnage
430

Other editions - View all

Mineral Technology and Output Per Man Studies, Issue 6
National Research Project on Reemployment Opportunities and Recent Changes in Industrial Techniques (U.S.)
Full view - 1937
Mineral Technology and Output Per Man Studies, Issue 4
National Research Project on Reemployment Opportunities and Recent Changes in Industrial Techniques (U.S.)
Full view - 1937
Mineral Technology and Output Per Man Studies, Issue 3
National Research Project on Reemployment Opportunities and Recent Changes in Industrial Techniques (U.S.)
Full view - 1937
View all »

Common terms and phrases

annual volumes average number AVERAGE YIELD basalt blasting Bureau of Mines Census churn drill Comstock lode CONSTANT PRICES CORRY AND KIESSLING DAVID WEINTRAUB deposits district draglines drilling efficient employment engines equipment factors figure Florida land-pebble mines flotation gold and silver haulage horsepower improvements increased Kiessling U. S. Bureau labor lead and zinc Leadville limestone LONG TONS low-grade matrix mechanical milling Mineral Resources Minerals Yearbook MINES MINERAL TECHNOLOGY Missouri National Research Project open-pit mines OUNCES output per man-hour overburden pebble pebble mines percent period phosphate rock plant Progress Administration pump recovery region reported Resources and Minerals selective mining shift SHORT TONS South Carolina steam shovels STUDIES WPA-NATIONAL RESEARCH superphosphate TECHNOLOGY AND OUTPUT Tennessee tion tonnage TONNAGE AND VALUE TONS IN MILLIONS TOTAL PRODUCTION U. S. Dept United VALUE AT CONSTANT VALUE AT CURRENT volumes of Mineral western WPA-NATIONAL RESEARCH PROJECT YIELD OF METALS zinc

Bibliographic information

TitleMineral Technology and Output Per Man Studies, Issues 6-9
Mineral Technology and Output Per Man Studies, United States. Works Progress Administration
ContributorsUnited States. Works Progress Administration, United States. Work Projects Administration, National Research Project on Reemployment Opportunities and Recent Changes in Industrial Techniques (U.S.), United States. Bureau of Mines, United States. Bureau of the Census
PublisherWorks Progress Administration, 1938
Original fromthe University of California
Digitized20 Aug 2008
  
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