Excerpt from Report on Canadian Graphite: With Special Reference to Its Employment as a Refractory Material Sir, - I have the honour of herewith submitting to you the results of an investigation into Canadian graphite, undertaken with the object of determining, as far as possible, experimentally the relative value of Canadian graphite, as compared with that from Ceylon, for the manufacture of black-lead crucibles. The first four analyses here given appeared in my fast report; as, however, they are intimately connected with some contained in the present one, it has been thought desirable to incorporate them in this latter. Brief Outline of bone of the Methods Employed in the prosecution of this investigation. 1. Determination of the Specify Gravity. - Sufficient later having been introduced into the specific gravity bottle to thoroughly immerse the specimen of graphite therein contained, the whole was placed under the receiver of an air-pump, and exhaustion gradually proceeded with. The pumping was repealed at intervals, and until bubbles ceased to escape on further exhaustion. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books.

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