. 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. -bazite, has been found by Mr. Alger, among specimens of minerals fromNew-York Island. The crystals are very perfect double six-sidedpyramids, implanted on carbonate of lime. They have a wax yellowcolor, a waxy lustre, and are transparent. They show the incipientmodifications, from the primary rhombohedron, to the six-sided of the Boston Nat. Hist. Soc, ii., p. 86. It may be remarked that phakolite, although it
. 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. -bazite, has been found by Mr. Alger, among specimens of minerals fromNew-York Island. The crystals are very perfect double six-sidedpyramids, implanted on carbonate of lime. They have a wax yellowcolor, a waxy lustre, and are transparent. They show the incipientmodifications, from the primary rhombohedron, to the six-sided of the Boston Nat. Hist. Soc, ii., p. 86. It may be remarked that phakolite, although it has a primary formdiffering only a few minutes in its angles, compared with that of chaba-zite, is somewhat unlike in its chemical composition. Breithaupt sup-poses it to be a distinct species; while Rammelsberg, from his ownanalysis, is disposed to regard it as a mixture of acadiolite and scolesite,with an additional atom of water. HEULANDITE. (Mineralogy of New-York, page 346.) Well defined crystals of heulandite, with a form similar to fig. 335,of the Mineralogy of New-York, have been found with stilbite, in thefissures of gneiss, in 23d street, New-York. 141. The following are the results of an analysis of this mineral by : Silica, 59-64; alumina, ; lime, 7*44; soda, 116:potash, 0-74; water, 14*33. This composition indicates that heulan-dite should be ranked with the zeolites. Philosophical Mag. and Ann.,xxix., p. 556. It seems to be now settled, that the Lincolnite of Prof. Hitchcock,{Final Report on the Geological Survey of Massachusetts, p. 662,) isidentical with heulandite. Crystals, exactly like those described byHitchcock, have been found in gneiss on New-York Island. Alger, inSill. Jour., xlvi., p. 235. PREHNITE. (Mineralogy of New-York, page 349.) Since the publication of the Mineralogy, this mineral has been found in the fissures of gneiss in 23d street, New-York. Dr. Emmons also reports localities near Adirondack, and in Keene, Essex county. Rep. on t
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