TOTJEMALINE. 345 Havredal near Krageroe in Norway, I from Bamfossen near bnarum in Norway, m from Haddam in Connecticut, n from Haddam, having the appearance of being slightly decomposed, 0 from Unity in New Hampshire:— g h i k G 3-072 3-043 3'065 3'107 Fluorine 2’23 2-36 2'33 2'10 Phosphoric acid .... O'li 0’20 0'24 0'08 Silica _ 3770 38'45 38-00 37-11 Boracic acid 7'36 8'48 8‘99 8'78 Alumina 34-53 34-66 32-28 31-26 Fed oxide of iron .... 4-63 3'3l 6'36 7'57 Protoxide of iron .... 0 - 25 (fin o-oo) 1-51 077 Magnesia 9-61 9-11 7’27 9-43 F’KIO 1-25 0-71 1-31 080 ®°<la 2-00 2-00 1-43 1 78 Potash 0-43 0-73 0-28 0-32 Fluorine . . . Phosphoric acid Silica .... Boracic acid Alumina . . Fed oxide of iron Protoxide of iron Magnesia . . Bime .... Soda .... Potash . . . z m n 0 3145 3-136 3-132 3-192 1-71 1-78 1-95 1’59 O’ll traces — — 37-22 37-50 36-65 36-29 870 7-94 4-87 6-94 29'70 30-87 32-46 30-44 11-45 8-31 11-08 13-08 0-86 1-06 0-50 2-38 7’94 8-60 8-61 6-32 0-65 1-61 1'80 1’02 113 0-53 1-60 1 0 73 j 2-28 1-94 Analyses of the blackest tourmaline, with the largest pro portion of iron and the smallest of magnesia, in which the proportions of oxygen in the bases n, it and in the acids are uearly as the numbers 1, 6, 8, p from Bovey Tracy in Devon shire, q f r0 m Alabaschka near Mursinsk in the Ural, r from Sonnenberg near Andreasberg in the Harz, s from Saar in Moravia, t from Langenbielau in Silesia, u from Krummau 111 Bohemia:— p q r s t u 0 • 3-205 3-228 8-243 3'181 8-152 3-136 Fluorine .... V49 i - 64 rei 1-30 1-43 1-90 Q 5
