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SSAYS UPON SOME CONTROVERTED 



QUESTIONS. By Thomas li. Huxley, F. R. S., author 



of " Man's Place in Nature," etc. i2mo. Cloth, $2.00. 



" Professor Huxley is one of the most vigorous and uncompromising polemics of 

 tlie age. He is admittedly also one of the very ablest. In tliat debatable land which 

 touches the confines of science on the one hand and the confines of religion on the 

 other, there is no living man who can be called his supeiior. Professor Huxley takes 

 n*) mysterious or incomprehensible position. He plants himself on facts. There is, 

 he contends, no other safe or solid position. . . . He has compelled attention to the 

 truths of scienje. He has made religion more intelligent. He lias helped us to see 

 that science and religion are not mutually destructive — that the God of Nature and the 

 God of the Bible are one God." — Ckristmn at Work. 



' . . . Mr. Hu.\ley's literary style, also, is singularly lucid, polished, graceful, and 

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'HE NATURALIST IN LA PLATA. By C. 

 H. Hudson, C. M. Z. S., joint author of " Argentine Ornithol- 

 ogy." With 27 Illustrations. 8vo, 388 pages. Cloth, $4.00. 



" Mr. Hudson is not only a clever naturalist, but he po.ssesses the rare gift of in- 

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 bird, beast, and insect, no one will fail to be delighted." — Loiidoti Academy. 



" Mr. Hudson is a scientist, it is true, but apparently not enough of a scientist to 

 have lost the faculty of wonder and the knack of making readers wonder with him. 

 He has worked on an ornithology of the Argentine States, but his case appears to be 

 that of Audubon, and the results of avoiding the drudgery of science the same. At 

 least, he has so many new and interesting and piquant things to tell about the insects, 

 birds, and beasts found on the pampas, that few books of the sort, if any, which have 

 been published smce the work of Belt appeared, can vie with it in charm." — New 

 York Times. 



NEW EDITION OF 



RAGMEN TS OF SCIENCE. By John Tyndall, 



F. R.S., author of "Sound," "Heat as a Mode of Motion," 

 etc. Revised and enlarged edition. 2 vols. i2mo. Cloth, $4.00. 



The first edition of Professor Tyndall's "Fragments of Science" was 

 published some twenty years ago as a single volume, which was made up of 

 a score or more of his detached essays, addresses, and reviews. The book 

 was afterward revised, some of the papers recast, and from time to time new 

 ones added until, the size of the work becoming somewhat unwieldy, the 

 present two-volume edition was decided upon. This contains fifteen addi- 

 tional papers, and represents the author's latest changes and revisions. The 

 volumes are uniform with " New Fragments, recently issued, and the three 

 together include all the occasional writings which their author has decided to 

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