PUBLICATIONS OF THE NATURALISTS' AGENCY. 



THE AMERICAN NATURALIST, 



This Illustrated Monthly Magazine of Natural History began its Sixth 

 Volume with the Number for January, 1872. 



EVERY number of the NATURALIST contains (U large 8vo pages of reading matter, 

 illustrated by plates and wood cuts. All the leading Naturalists in the Country cor- 

 dially support it and contribute to its pages. The aim of the Editors is to make every 

 number of the Magazine of importance to all persons interested in Natural History, 

 and to keep its readers informed as to the late.-t discoveries and advances made in 

 this progressive and popular science. No teacher or student can now consider him- 

 self posted " by simply studying the latest text books, for they are necessarily old 

 almost as soon as issued, and it is 'only by keeping informed of the daily progress of 

 science through the medium of such Magazines as the NATURALIST that it is possible 

 to keep up with the times. Besides the leading articles in each number there are the 

 following special headings, under which the Miscellaneous and short notices are 

 grouped Keriews and Book Notices, Botany, Geology, Zoology, Anthropology, Micros- 

 copy, Notes, Notices of Specimens for Exchange and Books Received. 



The following are the titles of some of the leading articles in the numbers for January 

 to April. 1872 : CONCERNING DEEP-SEA DREDGINGS. By Prof. L. Agassiz. THE BLIND 

 FISHES OF MAMMOTH CAVE AND THEIR ALLIES. Illustrated by tivo 2)lates and cuts. 

 By F. W. Putnam. A NEW ERECTING ARRANGEMENT, FOR USE WITH BINOCULAR 

 MICROSCOPES. By R. II. Ward, M. D. THE RATTLESNAKE AND NATURAL SELECTION. 

 By Prof. N. S. Shaler. DISMISSAL OF THE LATE BOTANIST OF THE DEPARTMENT OF 

 AGRICULTURE. By Prof. A. Gray. THE MOUNTAINS OF COLORADO. By J. W. Foster, 

 LL.D. IRRIGATION AND THE FLORA OF THE PLAINS. By Rev. E. L. Greene. THE 

 FORMER RANGE OF THE BUFFALO. By J. G. Henderson. THE BREATHING PORES 

 OF LEAVES, inth plate.- By Prof. T. D. Biscoe. AQUEOUS PHENOMENA OF THE 

 PRAIRIES: By Prof. H. W. Parker. UNIFORMITY OF NOMENCLATURE IN REGARD TO 

 MICROSCOPICAL OBJECTIVES AND OCULARS: By R. II. Ward, M.D. THE STONE AGE 

 IN NEW JERSEY: illustrated: By C. C. Abbott, M.D. THE USE OF AMPHIPLEURA 



PELLUCIDA AS A TEST-OBJECT FOR HIGH POWERS. With a plate: By Dr. J. J. 



Woodward, U. S. A. WHAT is TRUE TACONIC: By Prof. James D. Dana. 



T E H M: H: 



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Single numbers 35 cents. Bound volumes $5.00 each. Covers for binding 50 cts. each. 

 Subscription to Vol. C (1872) and the 5 preceding vols. unbound for $17.75, or bound for 

 $22.00. (The bound volumes form a handsome illustrated work of reference that 

 should be iu every library.) 



A. S. PACKARD Jr. and F. W. PUTNAM, 



Editors and 1'roprietors. 



SALEM, MASS. 

 R. II. WARD, of Troy, N. Y., 



Associate Editor of Department of Microscopy. 



Address AMERICAN NATURALIST, 



SALEM, MASS. 



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