Heinemann’s Scientific Handbooks.

GEODESY. By J. Howard Gore. Small crown 8vo, illustrated, cloth, 5s.

MANUAL OF ASSAYING GOLD, SILVER, COPPER, and LEAD ORES. By Walter Lee Brown, B.Sc. With a Chapter on the ASSAYING OF FUEL, by A. B. Griffiths, Ph.D., F.R.S., F.C.S. Small crown 8vo, illustrated, cloth, 7s. 6d.

Colliery Guardian.—“A delightful and fascinating book.”

THE PHYSICAL PROPERTIES OF GASES. By Arthur L. Kimball. Small crown 8vo, illustrated, cloth, 5s.

Chemical News.—“The man of culture who wishes for a general and accurate acquaintance with the physical properties of gases will find in Mr. Kimball’s work just what he requires.”

HEAT AS A FORM OF ENERGY. Professor R. H. Thurston. Small crown 8vo, illustrated, cloth, 5s.

Chemical News.—“This work will prove both welcome and useful.”

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