The Publisher will mail this Journal to any Address in the United States, for one year, on receipt of 
Post Office Order for 11s. 
No. 14. Series. April 1880. [2s. 6d. 
THE POPULAR 
rtcitrc Eci'icra 
EDITED BY W. S. DALLAS, F.L.S. 
Assistant-Secretary of the Geological Society. 
CONTENTS. 
Chameleons. 
By Professor J. Reay Greene, B.A., M.D., F.L.S., F.Z.S., &c. (Illustrated.) 
The New Chemistry, a Development of the Old. 
By M. M. Pattison Muir, M.A., F.R.S.E. 
The Classification of the Tertiary Deposits. 
By Professor John W. Judd, F.R.S., Sec. G.S., &c. 
Artificial Diamonds. 
By F. W. Rudler, F.G.S. 
The Threshold of Evolution. 
By Surgeon-Major Wallich, M.D. (Illustrated.) 
REVIEWS. 
British Marine Polyzoa — The Crayfish — A Biological Atlas — Botany for 
Children — Intellect in Animals — Popular Geology — Field Geology. 
SCIENTIFIC SUMMARY. 
Astronomy — Botany — Chemistry — Geology and Palaeontology — Mineralogy — 
Physics — Zoology. 
ILLUSTRATED. 
LONDON : 
DAVID BOGUE, 
j 3 ST. MARTIN’S PLACE, TRAFALGAR SQUARE. 
LONDON : PRINTED BY STRANGEWAYS AND SONS, TOWER STREET, UPPER ST. MARTIN’S LANF. 
First Series, edited by Dr. H. Lawson, may be had complete in numbers, price 
£7 12s. 6d.; or, 15 Volumes, in cloth, £9 2s.; in half-morocco, £11 8s. 
