the broader surfaces, and on the narrow sides entirely so; wider below than above. The bevilled edge is more or less sharp, and, one of the principal surfaces being narrower than the other, the lateral planes form an obtuse angle with the
(Length of the originals, 434 inches.)
narrower surface, see Diagram b, a, b, c. Many of the wedges of this class, especially those made of such hard and precious stones as jasper, chalcedony, and agate, are distinguished by being curved so as to resemble our own adze. See Diagram c, a, b, c. A very fine wedge of this sort belongs to Mr. A. de Wilde. It is especially remarkable for its great size, being 25 Dutch inches long, 11 wide below, and 7 above, and from 1⋅5 to ⋅7 thick. It is in perfect preservation.
3. The third sort, which is possibly a modification of the second, exhibits a manifest and characteristic difference in its broad and fan-shaped form at the bevilled edge, which is sometimes ground sharp with a double angle from the narrower inner to the wider outer surface. (See Diagram d, a, b, c.)
4. To the fourth and last class, belong the more chisel--
