THE 
POPULAR SCIENCE 
REVIEW. 
A QUAETERLY MISCELLANY OF 
ENTERTAINING AND INSTRUCTIVE ARTICLES ON 
SCIENTIFIC SUBJECTS. 
EDITED BY HENRY LAWSON, M.D. 
VOLUME VIII. 
LONDON: 
ROBERT HARDWICKE, 192 PICCADILLY"; 
AND ALL BOOKSELLEES. 
1869. 
