ce to weather and to fire, must be of good appearance used in the recently constructed Columbia College [an As a weather resistant pure crystalline quartz would and impervious to moisture. It should also not be of such a tint as to become dingy or of ugly color when exposed. The streets of this and… … BLOCKS OF 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 are two general…
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