Records of the Geological Survey of India, Volume 90The Survey, 1962 - Earthquakes Vols. 1- include Report of the Geological Survey, 1867- ; v. 32- include Review of the mineral production of India, 1898/1903- ; v. 75 consists of Professional papers, no. 1-16; v. 76 consists of Bulletins of economic minerals. |
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Page 173
... glasses but the method of manufacture is essentially that of organic chemistry . The raw materials required for silicone manufacture are sand , brine , coal and oil . KINDS OF GLASSES I. Crown glass - Contains soda , lime and sand . A ...
... glasses but the method of manufacture is essentially that of organic chemistry . The raw materials required for silicone manufacture are sand , brine , coal and oil . KINDS OF GLASSES I. Crown glass - Contains soda , lime and sand . A ...
Page 174
... glass and hence a suitable combination of prisms of lenses can produce achromatic sets . VII . Phosphate glass - May be crown or flint type . Used in optical work . VIII . Silica free glass - Boric or phosphoric acid glasses are costly ...
... glass and hence a suitable combination of prisms of lenses can produce achromatic sets . VII . Phosphate glass - May be crown or flint type . Used in optical work . VIII . Silica free glass - Boric or phosphoric acid glasses are costly ...
Page 175
... glass con- taining barium has high R.I. , low dispersion and high ratio . But as many of the glasses are unstable , the choice of glasses for making combination lenses is limited . Glass sand which forms the bulk of the batch used in ...
... glass con- taining barium has high R.I. , low dispersion and high ratio . But as many of the glasses are unstable , the choice of glasses for making combination lenses is limited . Glass sand which forms the bulk of the batch used in ...
Contents
SUMMARY OF THE MORE IMPORTANT MINERALS V P SONDHI | 37 |
Asbestos | 44 |
Bauxite | 51 |
Copyright | |
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acid aluminium annual production asbestos Assam B. C. Roy bauxite Bihar Bombay Canada cement cent chemical chromite coal coke colour consumption copper corundum Cwts deposits district dolomite estimated export feet figures furnace Gallons Geol given in Table glass gold grade graphite gypsum Hyderabad ilmenite important increase India Indian Union industry Iron & Steel Iron and Steel Jodhpur kankar kaolin Kashmir kyanite lime limestone long tons Madhya Bharat Madhya Pradesh Madras magnesite manganese manganese-ore manufacture marble material metal mica miles mill million tons mineral mines Mysore nickel obtained occur ochres Orissa output oxide Pakistan partitioned in August pegmatites period under review producing countries quartz quinquennium under review Rajasthan refractory reported reserves rocks salt Saltpetre Saurashtra silica sillimanite Singhbhum sodium South STANFORD stones sulphate sulphuric Surv talc tion Tons Tons tons valued Travancore Uttar Pradesh veins Vindhya Pradesh wolfram world production Zawar zinc