Records of the Geological Survey of India, Volume 76, Part 10Geological Survey of India, 1942 - Earthquakes |
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Page 21
... manufacture of roofing insulation , particularly as a surfacing powder to prevent rolls of tarred material from sticking . Ground mica is also used for surfacing paint on asphalt shingles , Christmas tree snow , the manufacture of axle ...
... manufacture of roofing insulation , particularly as a surfacing powder to prevent rolls of tarred material from sticking . Ground mica is also used for surfacing paint on asphalt shingles , Christmas tree snow , the manufacture of axle ...
Page 58
... manufacture of washers and rings and of condenser plates . The block mica used for washers and rings is generally the smaller sizes of electrical quality . This mica is stamped by punch press to standard sizes of washers , etc ...
... manufacture of washers and rings and of condenser plates . The block mica used for washers and rings is generally the smaller sizes of electrical quality . This mica is stamped by punch press to standard sizes of washers , etc ...
Page 59
... manufacture of built - up mica are made almost entirely in India , with a relatively small amount from Canada , and also from Madagascar which has almost superseded the phlogopite from Canada on account of cost . In the past ...
... manufacture of built - up mica are made almost entirely in India , with a relatively small amount from Canada , and also from Madagascar which has almost superseded the phlogopite from Canada on account of cost . In the past ...
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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