In One Volume, Crown 8vo, Illustrated, 7s. 6d.
MANUAL OF ASSAYING GOLD, SILVER, COPPER, AND LEAD ORES.
By WALTER LEE BROWN, B.Sc.
Revised, Corrected, and considerably Enlarged,
WITH A CHAPTER ON THE ASSAYING OF FUEL, ETC.
By A. B. GRIFFITHS, Ph.D., F.R.S. (Edin.), F.C.S.
This work gives full details of the assaying and valuation of ores containing gold, silver, copper, and lead. The assaying of gold and silver bullion, fuels, &c., and full descriptions are given of the necessary apparatus, appliances, and re-agents, the whole being fully illustrated by eighty-seven figures in the text.
In One Volume, Crown 8vo, Illustrated, 5s.
THE PHYSICAL PROPERTIES OF GASES.
By ARTHUR L. KIMBALL, Of the Johns Hopkins University.