June 15, 2017

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In recognition of the importance of the abrasive industry and the
many inquiries concerning the uses, sources of supply, preparation, and
markets of the numerous minerals and materials included under the head-
ing of Abrasives, the writer has made an investigation resulting in a series
of bulletins embracing the subject in all its phases.
The following publications dealing with abrasives are issued as
separate bulletins.
Part I. Siliceous Abrasives: Sandstones, Quartz, Tripoli, Pumice,
and Volcanic Dust.
Part II. Corundum and Diamond.
Part III. Gamet.
Part IV. Artificial Abrasives and Manufactured Abrasive Products
and their Uses.
Up to the present there has been very little collected information on
Canadian sources of supply of abrasive silicas, although brief references
to, and descriptions of isolated deposits have appeared in many
Government reports and other periodicals. The writer has, therefore,
endeavoured to collect and sort out this information and bring it up to date
by local inquiries and field investigations. Most of the field work was done
during the years 1923-24-25. A brief description of the principal deposits,
production, and methods of treatment of the foreign materials have been
also included.

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In recognition of the importance of the abrasive industry and the many inquiries concerning the uses, sources of supply, preparation, and ...