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376 SILICATES. in Norway, p from the melaphyr between Botzen and Collman m the Tyrol, both by Delesse P 63-23 27-73 1-60 0-93 8'28 7-38 0-95 Labradorite occurs principally as a constituent of rocks with augite, diallage, hypersthene. The varieties which exhibit a thene rock° UrS ^ m ° stljr derived from a coarse-grained hypers- „, It ri is 1 found on the coast of Labrador, in the island of twi ’ m Rllss,a near Peterhof in Ingermannland, Kijew, in Finland at Ojamo and Miolo, in the Morne mountains in Ireland, Monzom in the Tyrol, in the Harz, in the duchy of and ®oo ur g in boulders, in greenstone porphyry at Campsie and Milngavie near Glasgow, Vico in Corsica, Neustadt near o pen in Saxony, Wiesbiihl near Lobenstein in the princi pality of Reuss, in dolerite at Penig, Rosswein, Siebenlehn in Saxony, the Meissner in Hessia, and the island of Skye, in hornblende rock at Russgarden in Dalarne in Sweden, in the dolentic porphyry of the Faroe islands, and at Egersuud in JNorway, in lava on Monte Pilieri near Nicolosi on AEtna, in the lava of Vesuvius. n o Silica^ 54'70 55*70 Alumina 29"80 25'23 Red oxide of iron . . 036 1-71 Magnesia .... Lime 7 Potash 0 . 23 3 Water 0 . 77 — 0'72 11'42 4-94 ■04 1 •63 J 213. CHRISTIANITE. — Anorthite ; Phillips, Beudant. Anorthomer Feld-Spath; Mohs. Anorthit: Hausmann Hai- dmger. Anorthic. IIo,TlO = 59° 30'; 010,110 = 62° 32'; 001,110 = 65 38 ; 111,001 = 68° lo'; 110,001 = 69° 3'. m 010, p 001, _e 021, n 021, x 101, y 201, i 201, 7 203, I 110, t I10, z 130, f 130, s 111, 0 ill, r 111, « 221, w 241, V 241. mp O 14 00 48' pt’ 114° 22' zm 30° 59' pi pi' 110 57 tv 59 30 frn' 29 27 69 3 mt 67 68 nm 47 25 pt 66 38 Im 62 32 np 46 47