Records of the Geological Survey of India, Volume 76, Part 10Geological Survey of India, 1942 - Earthquakes |
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Page 58
... plates have been recently despatched by mail . The Indian operators are remarkably expert in their judgment of thickness , and their work is checked by micrometer . In America each film is tested on an electrically- charged plate by ...
... plates have been recently despatched by mail . The Indian operators are remarkably expert in their judgment of thickness , and their work is checked by micrometer . In America each film is tested on an electrically- charged plate by ...
Page 59
... plate is obtained . The spirit is then driven off by heating in an oven at about 250 ° F , and the board inspected ... plate • Cold flexible plate Segment ( commutator ) plate Heater plate Mica paper Mica cloth 12-16 percent bond . 15-20 ...
... plate is obtained . The spirit is then driven off by heating in an oven at about 250 ° F , and the board inspected ... plate • Cold flexible plate Segment ( commutator ) plate Heater plate Mica paper Mica cloth 12-16 percent bond . 15-20 ...
Page 60
... plate can be moulded without heating , and is used for such insulation as in armature slots , field magnets , etc. It is made in similar thicknesses to moulding plate , and has a break- down strength of about 760 volts per mil . Segment ...
... plate can be moulded without heating , and is used for such insulation as in armature slots , field magnets , etc. It is made in similar thicknesses to moulding plate , and has a break- down strength of about 760 volts per mil . Segment ...
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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