Reports of the Inspectors of Mines of the anthracite and bituminous ...

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72 Reports of the Inspectors of Mines. [Off. Doc. Condition of the Collieries. During- the year 1891, the condition of the mines generally was im- proved. The damaging- effects of the numerous caves that occurred in the year 1890 were repaired and the working-s were g-enerally restored to a safer condition. The ag-g-reg-ate quantity of air entering- and circulating- through the mines is less than was circulating last year, but the quantity is still ample to effect g-ood ventilation. We may expect the ventilation to become less as the workings extend. It is the natural result of increased resistance to the passage of the air through the lengthened passages of the mines. In several mines of this district large fans are used exclusively to ventilate the workings of exhausted coal seams. Inasmuch as no persons are employed in those workings, the quantity of air currents produced is not reported to the Inspector and is not included in his table of ventilation. In the report of ventilation for 1890 for the Hollenback colliery, 367,565 cubic feet were reported in the intake, while for the same colliery this year, the quantity reported for the intake is only 61,- 181 cubic feet per minute. This difference arises from the fact that work was abandoned in the Baltimore and Hillman seams, and the shaft was sunk to the Ross and Red Ash seams, in which there are only a few persons yet employed. But while a large quantity of air enters the mine, only that portion which ventilates the Ross and Red Ash seams, where persons are emjjloyed, is reported. The quantity of air circulating through the workings of the abandoned seams remains nearly as large as it was when work was done therein. The Table A shows the ventilation of working seams only. With the exception of two or three collieries, the mines of this district are in good condition, and those which are not, are so on account of the existence of either fires or squeezes. A fire or squeeze invariably complicates the situation and jeopardizes the safety of a mine. There are three mines in this district at present affected in this manner and are not in condition to work, only such as is necessary to remove the danger and repair the damage done to the workings. Nearly all the mines are more or less gaseous, and the roof or rock overlying the coal seams, in the deepest portion of the basins, is weaker and more liable to "falls." The deeper portions of the basins are more dangerous for mining generally. The temperature is higher, which makes it more diflicult to ventilate. The bottom heaves, the top is more brittle, and a much larger quantity of explosive gases issue from the strata.
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CONTENTS. Report of Inspector of Se
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05 00 E-i W 02 H Z Q C o W S O t4 c
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6 Keports of the Inspectors of Mine
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8 Reports of the Inspectors of Mine
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10 Reports of the Inspectors of Min
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12 Reports of the Inspectors or Min
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Page 32 and 33: 22 REP0KT8 OF THE InSPECTOES OF MiN
Page 34 and 35: 24 Reports of the Inspectors of Min
Page 36 and 37: 26 Eeports of the Inspectors of Min
Page 42 and 43: 32 Keports of the Inspectors of Min
Page 44 and 45: 34 Reports of the Inspectorrs of Mi
Page 49 and 50: Official Document, No. 12. THIRD AN
Page 51 and 52: No. 12.] Thihd Anthkacite District.
Page 53 and 54: No. 12.] Thibd Anthbacite District.
Page 55 and 56: No. 12.] Third Anthracite District.
Page 59 and 60: No, 12 I Third Anthracite District.
Page 67 and 68: No. 12.] TniRD Anthracite District.
Page 71 and 72: No. 12.1 Third Anthracite District.
Page 75 and 76: No. 12,] Tried Anthracite District.
Page 77 and 78: No 12.] Thied Antheacite District.
Page 79 and 80: Official Document, No. 12. FOURTH A
Page 81: No. 12.] Fourth Anthracite District
Page 85 and 86: No. 12.] Fourth Anthracite District
Page 87 and 88: No. 12.] Fourth Anthbacite District
Page 89 and 90: No. 12.1 FouBTH Anthracite District
Page 96: C O N V N G H
Page 100 and 101: 86 Kepokts of the Inspectors of Min
Page 102: 88 Eeports of the Inspectors of Min
Page 106 and 107: : 90 Reports of the Inspectors of M
Page 110 and 111: 94 Reports of the Inspectors of Mix
Page 114 and 115: 98 Reports or the Inspectors of Min
Page 116 and 117: 100 EErOETS OF THE iNSrECTORS OF Mi
Page 118: 102 Reports of the Inspectors of Mi
Page 122 and 123: 104 Reports of the Inspectors of Mi
Page 124 and 125: 106 Eeports of the Inspectors of Mi
Page 131 and 132: No. 12.] FouETH Anthracite District
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No. 12.] Fourth Anthracite District
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No. 12.1 Fourth Anthracite District
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No. 12.] Fourth Antheacite District
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No. 12.;] Fourth Anthracite Distric
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Official Document, No. 12 FIFTH ANT
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No. 12.] Fifth Antheacite District.
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No. 12.] Fifth Anthkacite District.
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lô. 12.1 Fifth Anthracite Distkict
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PLAN a CROSS SECTION — o F TH e:
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No. 12.J Fifth Anthracite District.
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No. 12.] Fifth Anthracite District,
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No 12.] Fifth Anthracite District.
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No. 12.] Fifth Anthracite District.
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No. 12.] Fifth Anthkacite District.
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No. 12.] Fifth Anthracite District.
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J- F A U L.-1 FA U LT- Dab 0-fl.Q,Q
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154 Keports of the Inspectors of Mi
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156 Reports of the Inspectors of Mi
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164 Eeports of the Inspectous of Mi
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M A P OF PART OF WORKINGS FROM SLOP
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184 Keport of the Inspectors of Min
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186 Eepoets of the Inspectors of Mi
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192 Reports of the Inspectoks of Mi
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196 Eeports of the Inspectors of Mi
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212 Eepokts of the Inspectors of Mi
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216 Reports of the Inspectobs of Mi
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218 Keports of the Inspectorrs of M
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220 Reports of the Inspectoes of Mi
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Section On Line Or Slope No.!. Onei
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226 Kepokts of the Inspectors of Mi
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No. 12.] Sixth Anthracite District.
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T"'^'"Tn5v^ ,-_^,.,.Mvûj,i«j,-e»
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No. 12.1 Sixth Anthracite Distbict.
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'ô. 12. I Sixth >M O ^f O S " tlj;
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Official Document, No. 12. SEVENTH
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No. 12.] Seventh Anthracite Distric
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No. 12.] Seventh Antheacite Distric
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No. 12.] Seventh Anthracite Distwct
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Official Document, No. 12. EIGHTH A
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No 12.] Eighth Anthracite District.
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No. 12.] . Eighth Anthracite Distri
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No. 12.1 Eighth Anthkacite District
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No. 12.] Eighth Anthracite District
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No. 12.J Eighth Anthracite District
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BITUMINOUS MINE DISTRICTS 19-12-91.
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No. 12.J Second Bituminous District
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No. 12.1 Second Bituminous District
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No. 12.] Second Bituminous District
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No. 12.] Second Bituminous Disteict
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No. 12.] Second Bituminous Distkict
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No. 12.] Second Bituminous Distkict
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No. 12. Second Bituminous Disteict.
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• No. 12.] Second Bituminous Dist
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Mo. J 2. Second Bituminous District
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358 Keports of the Inspectoes of Mi
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360 Keports of the Inspectobs of Mi
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362 Repoets of the iNSPEcrohs of Mi
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368 Repoets of the Inspectors of Mi
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378 Eepobt of the Inspectors of Min
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380 Repokts of the Inspectors of Mi
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384 Eepokts of the Inspectors of Mi
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386 Eeport of the Inspectoes of Min
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Official Document, No. 12. FIFTH BI
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No. 12.] Fifth Bituminous Disteict.
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HiCAD FRAME.
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400 Reports of the Inspectoks of Mi
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404 KEPORfS OF THE INSPECTORS OF Mi
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408 Kepokts of the Inspectors of Mi
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No. 12.] ' Fifth Bituminous Distric
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No 12.] Fifth Bituminous District.
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No. 12.] Fifth Bituminous District.
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No. 12.J Fifth Bituminous District.
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No 12.] Fifth Bituminous District.
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No. 12.1 Fifth Bituminous Distkict.
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No. 12.J Fifth Bituminous Disêict.
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426 Reports of the Ixspectoks of Mi
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46 2 Eeports of the Inspectors of M
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486 KEroRTs of the Inspectoes of Mi
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488 Eeports of the Inspectoes of Mi
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490 Beports of the iNsrECXOES OF Mi
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'111 \ ) ] \ \ — GRASSFLAT MINE S
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No. 12.] Eighth Bituminous District
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EXPLANATION STOPPING GROSSING REGUL
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504 Eepokts of the Inspectoes of Mi
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508 Eeports of the Inspectoes of Mi
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510 Reports of the iNsrECTOiis of M
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5V2 Eeports of the Inspectoes of Mi
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Reports of the Inspectors of Mines of the anthracite and bituminous ...

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