The Leading American Scientific Journal 



The Popular Science Monthly 



"^HE POPULAR SCIENCE MONTHLY has for nearly thirty years 

 done valuable work in making the American public acquainted with the 

 new discoveries in natural science. It has had few rivals and no equal in the 

 educative service it has done for the American people. A complete set of the 

 volumes thus far published is both a history of science for the period covered and 

 at the same time a pretty complete cyclopedia of natural science. There is 

 nothing to fill its place, and to carry it on is a benefaction to the public." 



— W. T. Harris, U. S. Commissioner of Education. 



A 



THE BOUND VOLUMES OF THE 



Popular Science Monthly 



MONG the names of distinguished contributors to THE POPULAR SCIENCE 

 MONTHL Y in the earlier part of its career are the following, selected at 

 random from the first few numbers : 



JOHN TYNDALL T. H. HUXLEY 



HERBERT SPENCER HENRY MAUDSLEY 



R. A. PROCTOR ANDREW D. WHITE 



HENRY WARD BEECHER JOHN FISKE 



CHARLES KIN^SLEY CHARLES W. ELIOT 



ALFRED RUSSl \L WALLACE FRANCIS GALTON 



JOSEPH LE COI V E ERNEST HAECKEL 



Some of the earlier volumes of THE POPULAR SCIENCE MONTHLY are out 

 of print. Old subscribers who have files of these missing volumes, in good condition, 

 can have them bound in the green cloth of the series by sending the copies to us, 

 charges prepaid, to be promptly returned to the sender. The charge in such cases 

 will be $1.00 per volume. 



To such persons as prefer to employ the services of their own binder, binding cases 

 {green cloth, gold lettering) will be supplied at 50 cents each. 



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Volumes ! to LV, inclusive, except volumes 1, II, V, XX, XXI, XXIII, XXX, XXXIII, 

 and XXXIV, which are out of print, green cloth, per volume, - - $3-5° 



Volume LVI and subsequent volumes, green cloth, 2.50 



Back Numbers, from May, 1872, to and including the issue of December, 1899, except 

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Subsequent copies, as cents. 



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