 | Friedrich Mohs - 1825 - 492 pages
...consists, according to VAUttUELiN and KLAPROTH, of Oxide of Chrome 43-00 55-50. Protoxide of Iron 34-70 33-00. Alumina 20-30 6-00. Silica 2-00 2-00. Alone...borax, and imparts to it a beautiful green colour. 2. The varieties of the present species frequently occur in 0«DER TIll. AXOTOMOUs IRON-ORE. 397 a... | |
 | Friedrich Mohs - Mineralogy - 1825 - 560 pages
...Iron 34.70 33.00. Alumina 20.30 6.00. Silica 2.00 2.00. Alone it is infusible before the blowpipe, hut acts upon the magnetic needle, after having been exposed...borax, and imparts to it a beautiful green colour. 2. The varieties of the present species frequently occur in a compound state. The hexahedral crystals... | |
 | 1841 - 488 pages
...usual chrome ore, found in the market, varies from 3.4. It is fusible before the blowpipe ; but it acts upon the magnetic needle, after having been exposed to the reducing smoking flame. It is entirely soluble in borax at a high blowpipe heat, and imparts to it a beautiful... | |
 | Francis Lieber, Edward Wigglesworth - Encyclopedias and dictionaries - 1838 - 618 pages
...&3.00 Alumina, 20.30 . . o'.OO Silica, 2.00 . . 2.00 Alone, before the blow-pipe, it is infusible, lint acts upon the magnetic needle, after having been exposed to the reducing flame. It is dissolved when heated with borax, to which it imparts a beautiful green color. It was first found in... | |
 | Science - 1841 - 444 pages
...another specimen gave, respectively, 55'5, 34, 6, and 2. It is fusible before the blowpipe ; but it acts upon the magnetic needle, after having been exposed to the reducing smoky flame. It is entirely soluble in borax, at a high blowpipe heat, and imparts to it a beautiful... | |
 | Andrew Ure - Industries - 1844 - 756 pages
...specimen gave as above, respectively, 55'5, 33, 6, and 2. It is infusible before the blowpipe ; but it acts upon the magnetic needle, after having been exposed to the reducing smoky flame. It is entirely soluble in borax, at a high blowpipe heat, and imparts to it a beautiful... | |
 | Edward Andrew Parnell - Calico-printing - 1846 - 770 pages
...specimen gave as above, respectively, 55-5, 33, 6, and 2. It is infusible before the blowpipe ; but it acts upon the magnetic needle, after having been exposed to the reducing smoky flame. It is entirely soluble in borax, at a high blowpipe heat, and imparts to it a beautiful... | |
 | Andrew Ure - Industrial arts - 1856 - 1140 pages
...specimen gave as above, respectively, 55-5, 33, 6, and 2. It is infusible before the blowpipe ; but it acts upon the magnetic needle, after having been exposed to the reducing smoky flame. It is entirely soluble in borax, at a high blowpipe heat, and imparts to it a beautiful... | |
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Vauquelin's analysis of another specimen gave as above, respectively, 55-5, 33, 6, and 2. It is infusible before the blowpipe ; but it acts upon the magnetic needle, after having been exposed to the reducing smoky flame. It is entirely soluble in borax,... 