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UNITED STATES, CANADA AND MEXICO
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187
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in
color, soft enough to work readily, and capable of producing most
excellent effects, particularly in rock-faced work and rubble work. It
has been used extensively in Philadelphia and vicinity, where it was
employed in the construction of the buildings of the University of
Pennsylvania and the Academy of Natural Sciences, and it has also been
used to some extent in New York City and Washington.1 Bowenite
is a variety of serpentine found in some quantity at Smithfield, R. L,
varying in color from a pure white through light green to deep green.
It is the "jade" and " nephrite" of the early American mineralogists,
so-called on account of its remarkable toughness and its hardness. As
yet, however, no archaeological objects made from it have been found.
Its rich color and peculiar toughness and hardness suggest it for use,
to some extent, where jade has previously been employed. Prof. Genth"
mentions as having been found at Easton, Pa., a bowenite of a greenish
and reddish-white color and of great tenacity, frequently containing a
small quantity of tremolite. The ease with which this material is
worked, and the effective designs that can be made from it, suggest it
for decorative purposes. Analyses of serpentine from Hartford Co.,
Wilmington, Del., by Professor Genth, have been made with the following
result:
SERPENTINE
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Williamsite
is a variety of serpentine found in Texas, Lancaster County, Pa., and
in Maryland. Owing to its rich green color, and the ease with which it
can be cut, it has been used to a
1 Cf. Building and Ornamental Stones of the United States, by George P. Merrill, Pop. Sci. Monthly, Vol. 27, p. 520.
8 Contributions to Mineralogy (1876).
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