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THE POPULAR SCIENCE 
MONTHLY, 
Eprrep sy WILLIAM JAY YOUMANS, 
Well known as a trustworthy medium for the spread of scientific truth 
in popular form, is filled with articles of interest to everybody, by the 
ablest writers of the time. 
Its range of topics, which is widening 
with the advance of science, includes— 
PREVENTION OF DISEASE AND IMPROVEMENT OF THE RACE. 
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RELATIONS OF SCIENCE AND RELIGION. 
THE INDUSTRIAL ARTS. 
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Among its recent contributors are : 
W. A. HAMMOND, M.D., 
HERBERT SPENCER, 
DAVID A. WELLS, 
T. H. HUXLEY, 
Sm JOHN LUBBOCK, 
EDWARD ATKINSON, 
T. D, CROTHERS, M.D., 
W. K. BROOKS, 
E. D. COPE, 
DAVID STARR JORDAN, 
T. MITCHELL PRUDDEN, M.D., 
JOSEPH LE CONTE, 
APPLETON MORGAN, 
FELIX L. OSWALD, 
J. 8. BILLINGS, M.D., 
BENJ. WARD RICHARDSON, M. D.,. 
ANDREW D. WHITE, 
F, W. CLARKE, 
HORATIO BALE, 
EDWARD 8. MORSE, 
J. 8. NEWBERRY, 
WALTER B. PLATT, M.D., 
EUGENE L. RICHARDS, 
THOMAS HILL, 
N. 8. SHALER, 
D. G. THOMPSON, 
AMBROSE L. RANNEY, M.D., 
GRANT ALLEN, 
Sm WILLIAM DAWSON, 
J. HUGHLINGS JACKSON, M.D. 
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