Transactions . on the hanging-wall side whichshows a slight pinta of silver sulphide. The ore would appear to bechanging here into the class known as negros. Between the two classesof ore {colorados and negros) the filling is confused, consisting of soft * The strike of this vein is not shown correctly on the plan. 118 SILVEE-BEAiaNG VEINS OF MEXICO. highly altered rock with black stains and patches, and with some oxideof iron and quartz. The nearest parallel vein to the east dips 45 degrees and has a cijitaof oxidized ore 15 inches thick. The veins of San Francisco {bis) appear to be of the c
Transactions . on the hanging-wall side whichshows a slight pinta of silver sulphide. The ore would appear to bechanging here into the class known as negros. Between the two classesof ore {colorados and negros) the filling is confused, consisting of soft * The strike of this vein is not shown correctly on the plan. 118 SILVEE-BEAiaNG VEINS OF MEXICO. highly altered rock with black stains and patches, and with some oxideof iron and quartz. The nearest parallel vein to the east dips 45 degrees and has a cijitaof oxidized ore 15 inches thick. The veins of San Francisco {bis) appear to be of the class known as fissure-veins, and are quite distinct in appearance from the otherdeposits examined in this district. The President moved that a hearty vote of thanks be accorded to^Ir. Halse for his valuable paper. He might add that Mr. Halse hadcontributed many papers to the Transactions, The motion was cordially approved. 7h^ Jnsi ^Op^aluuf WntoTty G)Uzery etc^ ngs of Vinton Colliery No. 3, Vol. 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^^ i£Zi ? ???.? D pL Scale. 2S0 Feet (o ; Inch.
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Keywords: ., bookcentury1800, booksubjectmechan, booksubjectmineralindustries
