Precious Stones: Considered in Their Scientific and Artistic Relations, with a Catalogue of the Townshend Collection of Gems in the South Kensington Museum

Front Cover
Committee of Council on Education, 1883 - Gems - 111 pages
0 Reviews

What people are saying - Write a review

We haven't found any reviews in the usual places.

Other editions - View all

Common terms and phrases

Popular passages

Page 17 - But a caution as to the necessity in all specific gravity experiments of getting rid of air-bubbles may not be out of place. To attain this end boiled water should be used, and if mechanical contrivances fail (a feather or sable pencil) then the liquid and stone should be placed under the receiver of an air-pump and the air exhausted. Details concerning the specific gravity of each kind of precious stone will be found in Chapter VII.

Bibliographic information