o the latter type, Brownstone buildings are seen whose carved portions the Potsdam sandstone is closely assimilated. It de- the best examples, and in these no decomposition takes place. Of these sandstones, it will be noticed are disintegrating and the faces of whose smooth wall parts far enough… … SELECTING LARGE BLOCKS OF STONE. at Potsdam, N. Y., from which this stone is properly termed an anomalous one, proves extracted for building purposes. Here the what the stone may be. We have said that granite may be weather resisting. famous sandstone is attacked at the place where it that there…
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