361:"}},"text\/plain":{"en":{"":"checksum"}}},"{\"value\":\"cfd8ca7decf1030109e08ce61ca5dd28429250eb\",\"type\":\"string\"}":{"text\/html":{"en":{"P4092":"cfd8ca7decf1030109e08ce61ca5dd28429250eb"}},"text\/plain":{"en":{"P4092":"cfd8ca7decf1030109e08ce61ca5dd28429250eb"}}},"{\"value\":{\"entity-type\":\"property\",\"numeric-id\":459,\"id\":\"P459\"},\"type\":\"wikibase-entityid\"}":{"text\/html":{"en":{"":"
234:
357:
198:
77:
365:"}},"text\/plain":{"en":{"":"determination method"}}},"{\"value\":{\"entity-type\":\"item\",\"numeric-id\":13414952,\"id\":\"Q13414952\"},\"type\":\"wikibase-entityid\"}":{"text\/html":{"en":{"P459":"
323:"}},"text\/plain":{"en":{"":"media type"}}},"{\"value\":\"image\\\/png\",\"type\":\"string\"}":{"text\/html":{"en":{"P1163":"image\/png"}},"text\/plain":{"en":{"P1163":"image\/png"}}}}": -->
428:"}},"text\/plain":{"en":{"":"data size"}}},"{\"value\":{\"amount\":\"+96403\",\"unit\":\"http:\\\/\\\/www.wikidata.org\\\/entity\\\/Q8799\"},\"type\":\"quantity\"}":{"text\/html":{"en":{"P3575":"96,403
473:"}},"text\/plain":{"en":{"":"height"}}},"{\"value\":{\"amount\":\"+762\",\"unit\":\"http:\\\/\\\/www.wikidata.org\\\/entity\\\/Q355198\"},\"type\":\"quantity\"}":{"text\/html":{"en":{"P2048":"762
518:"}},"text\/plain":{"en":{"":"width"}}},"{\"value\":{\"amount\":\"+516\",\"unit\":\"http:\\\/\\\/www.wikidata.org\\\/entity\\\/Q355198\"},\"type\":\"quantity\"}":{"text\/html":{"en":{"P2049":"516
514:
601:
618:{{Information |Description= {{en|Origional caption: "Fig. 38. Panel Long-wall in Oklahoma." Plan of a multi-panel advancing longwall mine, circa 1917, using a face conveyor and rail haulage. The figure has been altered by moving the scale and legend.}
131:
Origional caption: "Fig. 38. Panel Long-wall in
Oklahoma." Plan of a multi-panel advancing longwall mine, circa 1917, using a face conveyor and rail haulage. The figure has been altered by moving the scale and
260:
for US works, such as Canada, Mainland China (not Hong Kong or Macao), Germany, Mexico, and
Switzerland. The creator and year of publication are essential information and must be provided. See
366:
515:
470:
425:
358:
320:
362:
256:
This image might not be in the public domain outside of the United States; this especially applies in the countries and areas that do not apply the
410:
43:
37:
529:
484:
439:
376:
330:
88:
403:
309:
56:
432:"}},"text\/plain":{"en":{"P3575":"96,403 byte"}}}}": -->
257:
628:
The following pages on the
English Knowledge use this file (pages on other projects are not listed):
522:"}},"text\/plain":{"en":{"P2049":"516 pixel"}}}}": -->
477:"}},"text\/plain":{"en":{"P2048":"762 pixel"}}}}": -->
261:
96:
369:"}},"text\/plain":{"en":{"P459":"SHA-1"}}}}": -->
150:
149:
Percentage of
Extraction on of Bituminous Coal with Special Reference to Illinois Conditions,
611:
265:
223:
8:
222:
occurred prior to
January 1, 1929, and if not then due to lack of notice or renewal. See
600:
595:
47:
32:
218:. This applies to U.S. works where the copyright has expired, often because its first
83:
299:
632:
215:
210:
219:
539:
494:
449:
386:
340:
568:
Click on a date/time to view the file as it appeared at that time.
71:
293:
Add a one-line explanation of what this file represents
626:
566:
95:
Commons is a freely licensed media file repository.
61:(516 × 762 pixels, file size: 94 KB, MIME type:
151:Engineering Experiment Station Bulletin No. 100
76:
137:
118:
157:
145:
14:
519:
474:
429:
392:cfd8ca7decf1030109e08ce61ca5dd28429250eb
233:
197:
107:
192:
559:
153:, University of Illinois, page 131.
13:
298:
292:
255:
244:
232:
206:
196:
125:
108:
54:
644:
297:
627:
283:
75:
21:
280:
126:
563:
279:
26:
1:
623:
305:Items portrayed in this file
168:
7:
10:
649:
208:This media file is in the
115:
110:
560:
16:
282:
258:rule of the shorter term
226:for further explanation.
82:This is a file from the
31:
617:
262:Knowledge:Public domain
140:
86:. Information from its
249:
238:
202:
89:description page there
36:Size of this preview:
248:
236:
200:
121:AdvancingLongwall.png
404:determination method
363:determination method
266:Knowledge:Copyrights
596:16:54, 15 July 2009
42:Other resolutions:
250:
239:
203:
621:
521:
476:
431:
291:
277:
276:
270:
268:for more details.
191:
190:
165:
164:
104:
103:
84:Wikimedia Commons
640:
613:Douglas W. Jones
608:
570:
548:
503:
458:
413:
408:
289:
271:
254:
247:
235:
199:
193:
187:
184:
181:
178:
173:
172:
130:
122:
116:
100:
79:
78:
72:
66:
64:
51:
48:516 × 762 pixels
44:162 × 240 pixels
38:406 × 600 pixels
648:
647:
643:
642:
641:
639:
638:
637:
633:Longwall mining
629:
622:
614:
606:
562:
561:
558:
557:
556:
555:
554:
553:
552:
551:
549:
546:
536:
535:
534:
532:
513:
512:
511:
510:
509:
508:
507:
506:
504:
501:
491:
490:
489:
487:
468:
467:
466:
465:
464:
463:
462:
461:
459:
456:
446:
445:
444:
442:
423:
422:
421:
420:
419:
418:
417:
416:
415:
414:
409:
406:
397:
396:
395:
393:
383:
382:
381:
379:
356:
355:
354:
353:
352:
351:
350:
349:
347:
337:
336:
335:
333:
318:
317:
316:
315:
314:
312:
296:
295:
294:
269:
253:
245:
228:
185:
182:
179:
176:
171:
166:
133:
120:
113:
106:
105:
94:
93:
92:is shown below.
68:
62:
60:
53:
52:
41:
12:
11:
5:
646:
636:
635:
625:
620:
619:
616:
612:
609:
603:
598:
593:
589:
588:
585:
582:
579:
576:
573:
565:
550:
544:
542:
541:
540:
538:
537:
533:
528:
526:
525:
524:
523:
517:
505:
499:
497:
496:
495:
493:
492:
488:
483:
481:
480:
479:
478:
472:
460:
454:
452:
451:
450:
448:
447:
443:
438:
436:
435:
434:
433:
427:
402:
401:
400:
399:
398:
394:
391:
389:
388:
387:
385:
384:
380:
375:
373:
372:
371:
370:
368:
364:
360:
348:
345:
343:
342:
341:
339:
338:
334:
329:
327:
326:
325:
324:
322:
313:
308:
306:
303:
302:
301:
300:
288:
287:
284:
281:
275:
274:
272:
251:
241:
240:
230:
204:
189:
188:
170:
167:
163:
162:
159:
155:
154:
147:
143:
142:
139:
135:
134:
123:
114:
112:
109:
102:
101:
80:
70:
69:
35:
30:
29:
24:
19:
9:
6:
4:
3:
2:
645:
634:
631:
630:
615:
610:
604:
602:
599:
597:
594:
591:
590:
586:
583:
580:
577:
574:
572:
571:
569:
543:
531:
527:
498:
486:
482:
453:
441:
437:
412:
405:
390:
378:
374:
344:
332:
328:
311:
307:
304:
285:
278:
273:
267:
263:
259:
252:
243:
242:
237:United States
231:
229:
227:
225:
221:
217:
216:United States
213:
212:
211:public domain
205:
201:Public domain
195:
194:
180:Public domain
177:Public domain
175:
174:
160:
156:
152:
148:
144:
136:
129:
124:
117:
98:
91:
90:
85:
81:
74:
73:
67:
58:
57:Original file
49:
45:
39:
34:
28:
25:
23:
20:
18:
15:
567:
564:File history
209:
207:
127:
97:You can help
87:
55:
22:File history
220:publication
161:C. M. Young
119:Description
624:File usage
605:516 × 762
581:Dimensions
331:media type
321:media type
27:File usage
578:Thumbnail
575:Date/Time
440:data size
426:data size
346:image/png
224:this page
169:Licensing
128:English:
63:image/png
377:checksum
359:checksum
286:Captions
141:1917-06,
607:(94 KB)
592:current
587:Comment
455:96,403
310:depicts
290:English
214:in the
132:legend.
111:Summary
59:
485:height
471:height
158:Author
146:Source
547:pixel
530:width
520:pixel
516:width
502:pixel
475:pixel
411:SHA-1
367:SHA-1
186:false
183:false
584:User
545:516
500:762
457:byte
430:byte
264:and
138:Date
17:File
407::
46:|
40:.
99:.
65:)
50:.