THE 
POPULAR SCIENCE 
REVIEW. 
A QUARTERLY MISCELLANY OF 
ENTERTAINING AND INSTRUCTIVE ARTICLES ON 
SCIENTIFIC SUBJECTS. 
EDITED BY HENRY LAWSON, M.D. 
VOLUME XII. 
LONDON: 
EOBERT HARDWICKE, 192 PICCADILLY; 
AND ALL BOOKSELLERS. 
1873. 
