WASTE PRODUCTS

AND

UNDEVELOPED SUBSTANCES:

OR,

HINTS FOR ENTERPRISE IN NEGLECTED FIELDS.

BY

P. L. SIMMONDS,

DEPUTY-SUPERINTENDENT OF THE COLONIAL DEPARTMENT, INTERNATIONAL
EXHIBITION;

Editor and Proprietor of "The Technologist," Author of "The Commercial Products
of the Vegetable Kingdom," " Dictionary of Trade Products," &c. &c.

"A snapper-up of unconsiderad tiles.

LONDON:

ROBERT HARDWICKE, 192, PICCADILLY.