154 
INDEX, 
Page. 
Vermont, slate of, analyses of 36, 105-108, 111 
slate of, bedding of, plate showing 20 
characteristics of 1 23-] 25 
cleavage bands in, figure showing. . 32 
composition of . . 13, 18, 39-44, 90-93, 104-110 
distribution of 100-101 
geology of 7, 34, 90, 93-95 
joints in 28 
minerals associated with 109-110 
nodules in 33 
prices of 125 
production of 126-131 
spots in 15-17 
structure in 19, 21-22, 29, 100-104 
plate showing 98 
slate quarries in. diagrams of 92,96 
western part of, slate deposits of 93-95, 
104-110,121 
slate deposits of. section of 94 
Vermont Black Slate Co., slate quarry of . 90, 124 
slate quarry of, structure in, figure 
showing 91 
Vermont Unfading Green Slate Co., slate 
quarry of 123 
Virginia, slate deposits of, location of Ill 
slate deposits Of, location of, map show - 
ing 112, lit., 117 
slate of, characteristics of 123 125 
composition of 11,113-119 
geology of 34,111-113 
pricesof 125 
production of 126-131 
structure of 19 
waste of 37 
Virginia slate Mining Co., slate property of 115-117 
W. 
Wales, slates of 6/23 
slates of, analyses of 34-35 
Page 
Walcott, Charles D., graptolites found by.. 95,99 
Warrenton, Va., slate prospects near 117-119 
Waterford, Vt., slate deposits at 89 
Watrin, N., on petrography of slate 27 
on slate characteristics 47 
on waste 42 
Weathering, chemical changes in 37-39 
Wells, Vt., section at 98 
shear zone at, plate showing 30 
West Castleton, Vt., slate quarries at 19.21 
slate quarries at, bedding of, plate show- 
ing 20 
West Monson, Me., slate quarry at 64, 124 
West Pawl et, Vt., section at 99 
slate structure at 19, 44, 98 
slip cleavage at, plate showing 26 
West Virginia, slate deposits of, location 
of 119 
slate depositsof, location of, map show- 
ing 120 
slate of, characteristics of 124 
composition of 10, 121-122 
geology of 6, 119 
weathering of 37, 122 
Wilhite slate, slate of 88 
Wilkinson, — . on slate characteristics 47 
Williams, George II., on Virginia slates — 114 
Williams,.!. F.,on slate characteristics. . 47,73,124 
Williams and Edwards, slate quarry of, 
shear zone in 30 
Williams Brothers, slate quarry of 115, 1 16 
Williams (John R.) Slate Co., slate quarry 
of 113, 123-0 21 
Z. 
Zircon in slate, occurrence of 11 
Zirkel, F., on slip cleavage 24 
