Bulletin of the United States Geological Survey--Corundum and Its Occurrence and Distribution in the United States (A Revised and Enlarged Edition of Bulletin ) . at the beautiful speci-mens of diaspore for whichthis mine is noted werefound. North of Walker Brookand about 500 feet fromthe Old mine is the Maciamine, where a small amountof surface work has beendone. Near the head of asmall ravine a tunnel wasstarted on the west of thevein to intercept it, butw^ork was discontinued be-fore the vein was reached. The next opening isnear the highest point ofthe vein on the easternslope of Gobb
Bulletin of the United States Geological Survey--Corundum and Its Occurrence and Distribution in the United States (A Revised and Enlarged Edition of Bulletin ) . at the beautiful speci-mens of diaspore for whichthis mine is noted werefound. North of Walker Brookand about 500 feet fromthe Old mine is the Maciamine, where a small amountof surface work has beendone. Near the head of asmall ravine a tunnel wasstarted on the west of thevein to intercept it, butw^ork was discontinued be-fore the vein was reached. The next opening isnear the highest point ofthe vein on the easternslope of Gobble (North) Mountain, about three-fourths of a milenorth of the Macia mine, and is known as the Sackett mine. Atthis part of the vein there was a considerable quantity of magnetitethat was practically free from corundum and was mined as an ironore. This mine was worked very extensively between twenty andthirty years ago, but had been abandoned until 1899, when it Avasreopened. The old works were near the highest point of the vein, onthe slope of the mountain, and were worked for about 30 feet. Thenew work was started 117 feet below the mine, and a tunnel from the. Fk 22.—Map showing the location of the emerydeposit at Chester, Mass. 136 CORUNDUM, ITS OCCURRENCE AND DISTRIBUTION. east side was run 114 feet to the
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