iPTXEX.io-A.Tionsrs oif the 



JOHNS HOPKINS UNIVERSITY, 



I. American Journal of Mathematics. S. Newcomb, Editor, and T. Craig, 



Associate Editor. Quarterly. 4 to. Volume VII in progress. $5 per 

 volume. 



II. American Chemical Journal. — I. Eemsen, Editor. Bi-monthly. 8vo. 



Yolume VI in progress. $3 per volume. 



III. American Journal of Philology. — B. L. G-ildersleeve, Editor. Quar- 



terly. 8vo. Volume V in progress. $3 per volume. 



IV. Studies from the Biological Laboratory. — Including the Chesapeake 



Zoological Laboratory. H. N. Martin, Editor, and W. K. Brooks, Asso- 

 ciate Editor. 8vo. Volume III in progress. $5 per volume. 



V. Studies in Historical and Political Science. — H. B. Adams, Editor. 



Monthly. 8vo. Volume III in progress. $3 per volume. 



VI. Johns Hopkins University Circulars. — Containing reports of scientific 



and literary work in progress in Baltimore. 4to. Vol. I, $5 ; Vol. II, $3 ; 

 Vol. Ill, $2 ; Vol. IV in progress. $1 per year. 



VII. Annual Report. — Presented to the President by the Board of Trustees, 

 reviewing the operations of the University during the past academic year. 



VII. Annual Register. — Giving the lis| of officers and students, and stating 

 the regulations, etc., of the University. Published at the close of the Aca- 

 demic year. 



Communications in respect to exchanges and remittances may be 

 sent to the Johns Hopkins University (Publication Agency), Baltimore, 

 Maryland. 



BECKER BROTHERS, 

 No. 6 Murray Street, New York, 



Manufacturers of Balances and Weights of Precision for Chem- 

 ists, Assayers, Jewelers, Druggists, and in general for every use 

 where accuracy is required. 



April, 18*71.— [tf.] 



"BAD LANDS" FOSSILS, ETC. 



Large stock of Baculites, 2£ to 10 in. ; Scaphites Conradi, Ammonites placenta, 

 5 lbs. to 49 lbs. ; jSTautilus DeKayii, Belemnites densus, Inoceramus problematicus t 

 Brontotherium, etc., etc. Teeth, Gastropods, etc. 4,000 lbs. Minerals ; Sioux 

 Indian Buckskin Relics. 4 page Price List. 



L. W. STTLWELL, Deadwood, D. T. 



