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Poho'ization. 121
but thought to have a monoelinic crystallization. Described and named provisionally by Heddle, "~s a probable "new Scottish mineral." -.lIin. Jla(i. , 11879, 57. Of new varieties, tlle ibllowing are of spe(;ial interest: A titan{leto,s crysolite, having a red eolor~ and containing 6"10 p.e. of titanic arid, has been ibund at Zernmtt, Switzerland. Described by ii, 15. A gelatinou.~ silicate, found near Lausamm, Switzerland~ has the consistency of paste when taken out, but gradually solidifies. It has the composition of ehabasite. Renevier, who described i L calls it "a mineral in an embryotie condition. xvi, 21; Am. Jo~o'. Sci., xviii, 72.
A mangano-ealcite, carrying 2"04 p. e. of barium earbonat% occurs in a crystalline limestone at Laangban. Described by Sjogren.
A barytie feldspar, carrying over 7 p. e. of baryta~ is described by Descloiseaux. Cleawtge angles were identical with those of labradorite, while its optical properties allied it with albite and ollgoelase. Lo('ality was unknown, but the mineral resembled the alt)ite from Steiermark.
LUg!KITE, a new variety oi' ferrous sulphate. It is found in small distorted ewstals , probably monoclinie, having a slight tinge of blnel The mineral carries a small percentage of manganese ; composition SO 4 (]?e Mn) -r-7H:O. Ratio of Mn to Fe as 1 : 10. It is rcgarded as being intermediate between mehmterite and mallardite, but differs fi'om both by not altering on exposure to air. It oeeurs at Lucky Boy silver mine, Utah, and is described by Carnot.--.lour. Chem. Soc.
In crystallographic mineralogy, it may be interesting to note that Streng, fi, om a study of the optical characters and an accurate measurement of the angles of the crystals of l).~/rostilpnite (firet)lende), pronounces this mineral to belong to the orthorhonll)ic and not to the monoelinie system ; and that Baumhauer, from an investigation of the etching figures produced on eustals of boraeite by acids~ is led to the conclusion of Mallard, that the spe(,ies belongs to the orthorhombic and not to the isometric system.
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