 In India, where the use of corundum by the old saikalgar (armourer) and lapidary has been known for many generations, the requirements of the country have been met by a few comparatively rich deposits, but it is doubtful if these are worth working for...  Records of the Geological Survey of India - Page 367by Geological Survey of India - 1925Full view - About this book
 | Corundum - 1915 - 736 pages
...economical devices for its separation can make mining remunerative. Here where the use of corundum has been known for many generations the requirements...working for export in the face of the competition from Europe and America, or will even stand against the importation of cheap abrasives. There is still... | |
 | Alfred Ernest Barlow - Corundum - 1915 - 560 pages
...economical devices for its separation can make mining remunerative. Here where the use of corundum has been known for many generations the requirements...working for export in the face of the competition from Europe and America, or will even stand against the importation of cheap abrasives. There is still... | |
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