. Annual report of the regents of the university on the condition of the State Cabinet of Natural History, with catalogues of the same. Science. 131 diffused through them, like the masses of anthracite found in those from Herkimer county. Occasionally they appear almost like crystals of specular iron itself, but with the form of quartz. It is probably to the disintegration of this ore that the ochery and cavernous appearance of these crystals is to be ascribed. The Natural bridge, in Lewis county, has furnished opaque crystals of quartz of considerable size, and presenting some interesting mod
. Annual report of the regents of the university on the condition of the State Cabinet of Natural History, with catalogues of the same. Science. 131 diffused through them, like the masses of anthracite found in those from Herkimer county. Occasionally they appear almost like crystals of specular iron itself, but with the form of quartz. It is probably to the disintegration of this ore that the ochery and cavernous appearance of these crystals is to be ascribed. The Natural bridge, in Lewis county, has furnished opaque crystals of quartz of considerable size, and presenting some interesting modifi- cations. To those already given, I can now add that whieh is here figured, and which is remarkable, as exhibiting only three terminal According to Vanuxem, hyalite is found in the Potsdam eandstone, half a mile below Canajoharie, in Montgomery count)^ Report on the Geol. Uh Dist., p. 29. TABULAR SPAR. (Mineralogy of New-York, page 270.) Dr. Emmons states that fine specimens of this rather rare mineral are found in Keene, Essex county. Geology of the 2d Dist., p. 286. NEMALITE. (Mineralogy of New-York, page 272.) Prof. Connell has recently analyzed this mineral. His results are very different from those of Dr. Thomson, but he operated upon a very small portion. They are as follows, viz: Magnesia, 57*86; protoxide of iron, 2-84; silica, 0*S0; water, 27-96; carbonic acid, 10*00; = 99*46. He supposes the formula to be, 5 Mg 0, HO •+? Mg O, C 02 H Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original New York State Museum. Albany, Regents of the University
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