THE POPULAR SCIENCE MONTHLY, 



(Established May, 1872,) 



Conducted ~by Prof. E. L. YOUMANS. 



THE POPULAR SCIENCE MONTHLY was started to promote the diffusion of valuable sci- 

 entifi^ knowledge, in a readable and attractive form, among all classes of the community, 

 and has thus far met a want supplied by no other periodical in the United States. 



The great feature of the magazine is, that its contents are not what science was ten 

 or more years since, but what it is to-day, fresh from the study, the laboratory, and the 

 experiment : clothed in the language of the authors, inventors, and scientists themselves, 

 which comprise the leading minds of England, France, Germany, and the United States. 

 Among popular articles, covering the whole range of NATURAL SCIENCE, we have the 

 latest thoughts and words of Herbert Spencer, and Professors Huxley, Tyndall, and R. A. 

 Proctor. Since the start, it has proved a gratifying success to every friend of scientific 

 progress and universal education; and those who believed that science could not be 

 made any thing but dry study are disappointed. 



The press all over the land is warmly commending it. We subjoin a few encomiums 

 from those recently given : 



" That there is a place for THE POPULAR SCIENCE 

 MONTHLY, no one can doubt who has watched the 

 steady increase of interest in scientific investigation 

 manifested in this country, not only by a select 

 class, but by the entire community.' 1 New York 

 Times. 



"A journal which promises to be of eminent 

 value to the cause of popular education in this 

 country." New York Tribune. 



"It is, beyond comparison, the best attempt at 

 journalism of the kind ever made in this country." 

 Home Journal. 



"The initial number is admirably constituted." 

 Evening Mail 



" We think it is not too much to say that this is 

 the best first number of any magazine ever pub- 

 lished in America." New York World. 



"It-Js just what is wanted by the curious and 

 progressive mind of this country, and ought to be 

 widely circulated." New York Evening Post. 



" It is the first successful attempt in this country 

 to popularize science in the pages of a monthly." 

 N. Y. School Journal. 



"Not the less entertaining because it is instruc- 

 tive." Philadelphia Age. 



"THE MONTHLY has more than fulfilled all the 

 promises which the publishers made in the pro- 

 spectus of publication." Niagara Falls Gazette. 



"It places before American readers what the 

 ablest men of science throughout the world write 

 about their meditations, speculations, and discov- 

 eries." Providence Journal. 



" This is a highly-auspicious beginning of a use- 

 ful and much-needed enterprise in the way of pub- 

 lication, for which the public owe a special debt of 

 obligation to Messrs. D. Appleton & Co." Boston 

 Gazette. 



"This new enterprise appeals to all who are in- 

 terested in the laudable effort of diffusing that in- 

 formation which is best calculated to expand the 

 mind and improve the conditions and enhance the 

 worth of life." Golden Age. 



"Just the publication needed at the present 

 day." Montreal Gazette. 



" This new magazine, in our estimation, has more 

 merit than the whole brood which have preceded 

 it." Oswego Press. 



" In our opinion, the right idea has been happily 

 hit in the plan of this new monthly." Buffalo 

 Courier. 



"This is one of the very best periodicals of its 

 kind published in the world. Its corps of contribu- 

 tors comprise many of the ablest minds known to 

 science and literature. It is doing a great and noble 

 work in popularizing science, promoting the growth 

 of reason, and leveling the battlements of old su- 

 perstitions reared in the childhood of our race be- 

 fore it was capable of reasoning." The American 

 Medical Journal, St. Louis, Mo. 



" This magazine Is worth its weight in gold, for 

 its service in educating the people." The American 

 Journal of Education, St. Louis, Mo. 



" This monthly enables us to utilize at least sev- 

 eral years more of life than it would be possible were 

 we obliged to wait its publication in book -form at 

 the hands of some compiler." TheWriting Teacher 

 and Business Advertiser ', New York. 



THE POPULAR SCIENCE MONTHLY is published in a large octavo, handsomely printed 

 on clear type, and, when the subjects admit, fully illustrated. Each number contains 

 128 pages. 



Terms: $5 per Annum, or Fifty Cents per Number. 



Postage free to all Subscribers in the United States, from January 1, 1875. 



A new volume of the POPULAR SCIENCE begins with the numbers for May and Novem- 

 ber each year. Subscriptions may commence from any date. Back numbers supplied. 



Now Ready, Vols. I., II., III., IV., and V., of The Popular Science Monthly . 

 embracing the 'Numbers from 1 to 80 (May, 1872, to October, 18T4). 5 vols., 8vo. Cloth, $3.50 per voL 

 Half Morocco, $6.50 per vol. 



For Sale, Binding Cases for Vols. I., II., III., IV., and V., of The Popular 

 Science Monthly. These covers are prepared expressly for binding the volumes of THE POPULAR 

 SCIENCE MONTHLY as they appear, and will be sent to Subscribers on receipt of price. Any binder can 

 attach the covers at a trifling expense. Price, 50 cents each. 



D. APPLETON $- CO., Publishers, 



549 & 551 Broadway, New York. 



