Transactions . PROGRESS OF LONGWALLS. District A —Finished. M B—Partially Finished. c- „ D—Just —Ready to Start. North o Vol XUX. Plate m lb UImtJYileMCkuwceRaa/flwnis3escripUonorjiesent<mdProposedM J^ntorvColliery etc. Fig. I. ^J^^-^ S ,y ?^ ^ 1^^ \J\ ^ ? ^ 1 JT^ // ^^^\ 1 I ^ \ ^ / -V</, ^^v^ ***«| A V .\ ~N.\</ / f /^^^^^ *^^W ^. >y ^^^fe ^% X *« rs ^?^ X %, X V \ ??? v^* T ^ °°^--» \ \^ ~ ^ \ ff^ Y\ ^ i iV^ I- V Fib. Illustrating the Workings of Vinton Colliery No. 3, Vl NTONDALE, PENNSYLVANIA. Stale, Feet to 1 Inch. Ui M Di ]D a O L J^^^^^j^^gg

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Keywords: ., bookcentury1800, booksubjectmechan, booksubjectmineralindustries