. Annual report of the regents of the university on the condition of the State Cabinet of Natural History and the historical and antiquarian collection annexed thereto. from Middleville, and is copied from Mr. Algers edition of PhillipsMineralogy, (page 6.) It is similar to the fig. 133, in the Mineralogyof New-York, which is from a crystal found in Greene county. Subsequent examination of the crystalline forms from this county,has led me to doubt whether fig. 152, of the Mineralogy of New-York,and fig. 9 a, (page 409) of Danas Mineralogy, 2d edition, are reallytrue modifications of this miner
. Annual report of the regents of the university on the condition of the State Cabinet of Natural History and the historical and antiquarian collection annexed thereto. from Middleville, and is copied from Mr. Algers edition of PhillipsMineralogy, (page 6.) It is similar to the fig. 133, in the Mineralogyof New-York, which is from a crystal found in Greene county. Subsequent examination of the crystalline forms from this county,has led me to doubt whether fig. 152, of the Mineralogy of New-York,and fig. 9 a, (page 409) of Danas Mineralogy, 2d edition, are reallytrue modifications of this mineral. The first was copied from Shepards. Mineralogy. The faces o and a, as represented in these figures, seemto be accidental, and to have been formed by the pressure of some por-[Nat. Hist.] 9 130 tion of the matrix of the crystal during the time of its formation. In-dividuals exhibiting this peculiarity, are not uncommon, and in somethe number of these so called planes, is still further increased. Since the publication of the Mineralogy of New-York, I have re-ceived sundry specimens of quartz crystals from St. Johnsville, inMontgomery county, collected by Mr. Israel Smith, Jr. One of theseis similar to fig. 156, from Middleville, but with the planes, z and %
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