Records of the Geological Survey of India, Volume 76, Part 10Geological Survey of India, 1942 - Earthquakes |
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Page 20
... electrical apparatus and machinery , in some of which the heat insula- tion as well as the electrical insulation properties of mica are of importance . For some purposes , as in Neon lights , it is used to support fragile electrodes ...
... electrical apparatus and machinery , in some of which the heat insula- tion as well as the electrical insulation properties of mica are of importance . For some purposes , as in Neon lights , it is used to support fragile electrodes ...
Page 53
... Electrical ⚫0013 Electrical • 2603 Electrical ⚫0309 .... Rejection 3.7553 " " 66 " " ( 6 On page 16 TREATMENT . 53.
... Electrical ⚫0013 Electrical • 2603 Electrical ⚫0309 .... Rejection 3.7553 " " 66 " " ( 6 On page 16 TREATMENT . 53.
Page 58
... electrical trade . The manufacture of special dies , precision cut , forms naturally an important section of such factories . A very large amount of block mica of electrical quality is stamped out for use in the millions of flat - irons ...
... electrical trade . The manufacture of special dies , precision cut , forms naturally an important section of such factories . A very large amount of block mica of electrical quality is stamped out for use in the millions of flat - irons ...
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Common terms and phrases
2nd quality albite amount approximately average Bihar Bihar mica Black dotted Black spotted block and splittings block mica built-up mica Calcutta Canada cleavage condenser films condenser plates countries country rock crude mica dealers diopside district electrical exported block feet felspar Geological Survey Giridih grade granite ground mica Heavily stained 1st high quality mica India Indian mica insulation Intermediate stained J. A. Dunn Kodarma Kodarma Reserved Forest large number larger sizes Lepidolite loose splittings M. S. Krishnan Madagascar Madras mainly manufacture mica belt mica exported mica industry mica mining mica produced mica splittings mica trade mica-schists micanite microcline miles muscovite obtained pegmatites percentage phlogopite potash felspar pyroxenite quality block mica quartz quartz core Rajputana Rajputana mica recent recorded ruby mica schists scrap mica sheet mica Short tons smaller solutions South stained 1st quality stoping Survey of India Table 13 trimmed United uparchalla veins washers