Ceylon, Java, Borneo and New Guinea In- 

 sects, especially Lepicloptera and Coleoptera, 

 singly or in lots ; also Orthoptera and Dragon 

 Flies, land and fresh-water Shells, offered at 



cheap prices. 



H. FRUHSTORFER, 

 Nov. 6t. Care German Consulate, Soerabaia, Java. 



B E K E R 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. 



ZE'-CXIBXjIO.A-'X'IOIISrS OB 1 THE 



• JOHNS HOPKINS UNIVERSITY. 



BALTIMORE. 



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



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

 volume. 



II. American Chemical Journal. — I. Remsen, Editor. 8 Nos. yearly. 8vo. 



Volume XI in progress. $4 per volume. 

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

 terly. 8vo. Volume X 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 IV in progress. $5 per volume. 



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



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



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



and literary work in progress in Baltimore. 4to. Vol. IX in progress. 

 $1 per year. 



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

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



VH. Annual Register. — Giving the list of officers and students, and stating 

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

 demic year. 



Rowland's Photograph op the Normal Solar Spectrum. New edition now 



ready. $20 for set of ten plates, mounted. 

 Observations on the Embryology op Insects and Arachnids. By Adam 



T. Bruce. 46 pp. and 7 plates. $3.00, cloth. 

 Selected Morphological Monographs. W. K. Brooks, Editor. Vol. I. 370 



pp. and 51 plates. 4to. $7.50, cloth. 

 The Development and Propagation op the Oyster in Maryland. By W. 



K Brooks. 193 pp. 4to; 13 plates and 3 maps. $5.00, cloth. 

 On the Mechanical Equivalent op Heat. By H. A. Rowland. 127 pp. 



8vo. $1.50. 



A full list of publications will be sent on application. 



Communications in respect to exchanges and remittances may be 

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

 Maryland. 



