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384 SILICATES. n 0 P 2 r 8 CO CD CO 48-15 48-79 49-26 50-91 46-35 27'02 25-38 28-16 26-40 25-81 26'34 0‘2I 1-48 0-32 0-54 0-76 0-32 12-71 1663 15-02 14‘44 13-34 17-00 0-85 0-84 1-29 — 0-58 0-54 7‘59 4-91 4-52 6-14 7-09 4-71 0-87 0-12 0-54 0-65 0-85 0-32 0-77 0-85 0-74 0-69 0-41 1-60 — — — — — 0-99 Silica . . . Alumina . . lied oxide of iron Lime . . Magnesia Soda . . Potash . Volatile . Undecomposed Analyses of nuttallite (n = 4'0...4'o) t from Bolton in Massa chusetts by Stadtmuller, of metamorphosed scapolite u from Ersby by Nordenskiold, v from Bolton in Massachusetts by Thomson, w from Sjosa in Sweden, red (h = e - o, o = 2"643), very difficult to fuse before the blowpipe, not decomposed by hydrochloric acid, by Berzelius, % from Pargas in slender grey crystals, not cleavable (n = 6'0 or more, g = 2-65), infusible and not decomposed by acids, by Wolff:— Silica . . . Alumina . . Lime . . . Magnesia Bed ox. iron Potash . . Water . . The analyses of varieties of meionite vary greatly, partly in consequence of the decomposition of the mineral, to which it is very liable, and partly on account of a mechanical admixture of quartz or mica. In attached and imbedded crystals, and massive. The transparent variety (meionite) is found near Vesuvius in cavities in granular limestone in the debris of ancient erup tions. The opaque varieties are found in the iron mines of Arendal in Norway ; Malsjo, Hallestad, Hesselkulla in Sweden ; at Pargas in Finland; at Eisenberg, Strasko and Ebersdorf in Moravia; at Akudlek in Greenland; at Bareges in France; at Bolton, Warwick and many other places in North America. The minerals usually arranged under scapolite differ con siderably in hardness. On this account the softer varieties have been regarded by Mr. Brooke as a distinct mineral, and named nuttallite. Specimens from Arendal, some from Finland, and one, according to its ticket, from Jefferson County, New t U V W X 45'79 41-25 46-30 61-60 92-71 30-11 33-58 26-48 25 35 — 17-41 20-36 18-62 3-00 — — — 0-75 —• 1-86 — — 1-50 7-29 3'49 Mg, Mn 0’54, Na, Li 3-64, Na,k 5 00 — 1'63 3'32 6-04 Mn 1’50 —
