mined upon short notice. The output for the year 

 1885 reached 508,864 tons, 6 cwt., and the total to 

 January 1, 1886, in round numbers, 7,000,000 tons. 

 Probably 30.000,000 tons still remain above water- 

 level, before there will be any necessity to tap the 

 underground deposit. Mr. A. E. Lehman de- 

 scribed the method of construction of the model of 

 the above mine. It is built entirely of layers of 

 cardboard, the perpendicular ed^es of which are 

 brought to slope by engraving-tools. It was so con- 

 structed that the accurate location of the contour 

 lines was preserved, and they were drawn in ink on 

 the finished surface, adding greatly to its practical 

 value and intelligibility. Property lines, railroads, 

 and other topographical features and areas, are 

 shown in ink and color. The whole work is one of 

 remarkable neatness. 



Calendar of Societies. 



Biological society, Washington. 



May 1. — R. E. C. Stearns, Instances of the effect 

 of musical sounds on animals ; John A. Ryder, The 

 evolution of the mammalian placenta ; T. H. Bean, 

 The trout of North America, with exhibition of 

 specimens ; W. H. Dall, On the attachment of 

 Lingula, with exhibition of specimens ; On the 

 divisions of the genus Pecten. 



Anthropological society, Washington. 



May 4. — Frank Baker, Some anthropological 

 notes on the human mind ; Myrom Eells, The stone 

 and bone age on Pugret Sound. 



Publications received at Editor's Office, April 26-May 1. 



Bailey, F. H. Primary' phenomenal astronomy for teachers 

 and general readers. Northville, Mich., The author, 1886. 104 

 p. 16 . 



Becker, B. Zinzendorf im verhaltnis zu philosophic und kir- 

 chentum seiner zeit. Leipzig, Hznrichs, 1886. 8+580 p. 8°. 

 (New York. Stechert, S3.) 



Berghaus, H. Physikalischer atlas. Lief, i : Mittellandisches 

 und Schwarzes Meer; Jahres-isothermen ; Florenkarte von Euro- 

 pa. Gotha, Perthes, 1886. 3 col. maps. 40X48.5 cm. (New York, 

 Westermann, $1.) 



Brewster, W. Memoirs of the Nuttall ornithological club. 

 No. i. : Bird migration. Cambridge, Nutt. ornith. club, 1886. 

 22 p. 8°. 



Falckenberg, R. Geschichte der neueren philosophic von 

 Nikolaus von Kues bis zur gegenwart. Leipzig, Veit, 1886. 8+ 

 493 p. 8°. (New York, Stechert, $2 20.) 



Girard, J. Recherches sur l'instabilite des continents et du 

 niveau des mers. Paris, Leroux, 1886. 216 p., illustr. 8°. 



Loewl, F. Die ursache der secularen verschiebungen der 

 strandlinie. Prag, Dominicus, 1886. 15 p. 8°. (New York, 

 Stechert, 25 cents.) 



North Carolina agricultural experiment station, annual report 

 of the, for 1885. Raleigh, State, 1886. in p., illustr. 8°. 



Pinner, A. Repititorium der organischen chemie. 7th ed. 

 Berlin. Oppenheim, 1886. 14-1-391 p., illustr. 12 . (New York, 

 Stechert, $2.40.) 



Resch, P. Die entwickelungsstufen der volkswirthschaft. 

 Leipzig, Moser y 1886. 246 p. 12 . (New York, Stechert, Si. 10.) 



Russ, K. Vogel der heimat. Lief. i. Leipzig, Freytag, 1886. 

 32 p., [3! col. pi. 8°. (New York, Stechert, 40 cents.) 



Sweet, H. Elementarbuch des gesprochenen englisch gram- 

 matik. Oxford, Clarendon pr., 1885. 64+63 p. 16 . (New 

 York, Stechert, 90 cents.) 



Vinassa, K. Beitnige zur pharmakognostischen mikroskopie. 

 Braunschweig, Bruhn, 1886. 19 p., illustr. 8°. (New York, 

 Stechert, 35 cents.) 



Wallaschek, R. Ideen zur praktischen philosophic Tubin- 

 gen. Laupp, 1886. 4+156 p. 8°. (New York, Stechert, $1.10.) 



Advertised Books of Reference. 



INSECTS INJURIOUS TO FRUITS. By Prof. William 

 Saunders, F.R.S.C. Handsomely illustrated with 440 wood en- 

 gravings. Crown, 8vo. Cloth. $3. J. B. Lippincott Company, 

 Pubs., Philadelphia. 



ALLGEMEINEF HISTORISCHER HAND ATLAS in 69 

 maps with explanatory text under the direction of Dr. Richard 

 Andree. By Professor G. Droysen. A complete atlas of an- 

 cient, mediaeval and modern geography, especially in relation 

 to political development. Half bound, cloth sides, $9.20. Gus- 

 tav E. Stechert, 766 Broadway, N.Y. 



INSTRUCTION FOR THE DETERMINATION OF 

 ROCK-FORMING MINERALS. By Dr. Eugen Hussak, 

 Privat Doceat in the University of Grau. Translated from the 

 German by Erastus G. Smith, Professor of Chemistry and Miner- 

 alogy, Beloit College. With 103 plates, 8vo, cloth. $3.00. John 

 Wiley & Sons, Pubs., Astor Place, New York. 



MANUAL OF THE BOTANY OF THE ROCKY 

 MOUNTAINS. Coulter (Wabash Coll.), 8vo., 49 pp. $1.85. 

 Ivison, Blakeman, Taylor & Co., Pubs., New York. 



THE BUTTERFLIES OF THE EASTERN UNITED 

 STATES. For the use of classes in zoology and private stu- 

 dents. By G. H. French, A.M. Illustrated by 93 engravings and 

 a map of the territory represented. Large i2mo. Cloth. $2.00. 

 J. B. Lippincott Company, Pubs., Philadelphia. 



WILSON. — AMERICAN ORNITHOLOGY; or, The 

 Natural History of the Birds of the United States. By Alex- 

 ander Wilson. With a life of the author, by George Ord, F.R.S. 

 With continuation by Charles Lucien Bonaparte (Prince of Mu- 

 signano.) Popular Edition, complete in one volume with 385 

 figures of birds. Imp. 8vo. Cloth, $7.50. Half Turkey mor., 

 $12.50. Porter & Coates. Philadelphia. 



ANNALS OF MATHEMATICS. Edited by Osmond Stone 

 and William M. Thornton. Office of Publication : University of 

 Virginia. $2 per vol. of 6 nos. 



GEOLOGY. CHEMICAL, PHYSICAL. AND STRATI- 

 GRAPHICAL. By Joseph Prestwich, M.B., F.R.S., F.G.S. 

 Correspondent of the Institute of France, Professor of geology 

 in the University of Oxford. In two vols. Vol. 1.: Chemical and 

 Physical. 8vo. $6.25. (Oxford University Press.) Macmillan 

 & Co., Pubs., New York. 



ENCYCLOPAEDIA OF CHEMISTRY. Theoretical, prac 

 tical, and analytical, as applied to the arts and manufactures. By 

 Writers of Eminence. Profusely and handsomely illustrated. In 

 two volumes. Each containing 25 steel-plate engravings and 

 numerous woodcuts. Imperial 8vo. Price per set: Extra cloth, 

 $15.00. Library sheep, S18.00. Half morocco, $20.00. J. B. 

 Lippincott Company, Pubs., Philadelphia. 



HOURS WITH THE BIBLE, or the Scriptures in the Light 

 of Modern Discovery and Knowledge. By Rev. Cunningham 

 Geikie, D. D. The series covers the whole of the Old Testament. 

 6 vol. 12°. Cloth, with illustrations and index. Sold separately, 

 and each complete and distinct in itself. $1.50 per vol. James 

 Pott & Co., Pubs., New York. 



PHYSIOLOGICAL BOTANY: I. Outlines of the Histology 

 of Phaenogamous Plants; II. Vegetable Physiology. Goodale 

 (Harvard), 8vo., 560 pp. $2.30. Ivison, Blakeman, Taylor & 

 Co., Pubs., New York. 



STRUCTURAL BOTANY ; or, Organography on the basis 

 of Morphology' ; the principles of Taxonomy and Phytography 

 and a Glossary of Botanical terms. Gray (Harvard), 8vo., 454 pp. 

 $2.30. Ivison, Blakeman, Taylor & Co., Pubs. New York. 



LIPPINCOTT'S BIOGRAPHICAL DICTIONARY. A 

 new, thoroughly revised, and greatly enlarged edition. A univer- 

 sal pronouncing dictionary of biography and mythology. Con- 

 taining complete and concise biographical sketches of the eminent 

 persons of all ages and countries. By J. Thomas, M.D., LL.D. 

 Imperial 8vo. 2550 pages. Sheep. $12.00. J. B. Lippincott 

 Company, Pubs., Philadelphia. 



ELEMENTARY BIOGRAPHICAL HISTORY OF SCI- 

 ENCES (heroes of science) i2mo, cloth. $1.30 each by mail. 

 Botanists, zoologists, and geologists, by Prof. Martin Duncan. 

 Astronomers, by E. J. C. Morton, Esq. Chemists, by M. M. 

 Pattison Muir, F.R.S.G. Mechanicians, by T. C. Lewis. E. & 

 J. B. Young Co., Pubs., Cooper Union, New York City. 



THE INTERNATIONAL CYCLOPEDIA. The best for 

 popular use and specially adapted for ready reference. Fifteen 

 royal 8vo volumes. 13,296 pages, 49,649 leading titles. Sold only 

 by subscription. Capable salesmen wanted. Dodd, Mead &■ 

 Co., Pubs., New York. 



OUTLINES OF UNIVERSAL HISTORY: From earliest 

 times to 1886. 32 maps. Fisher (Yale), 8vo., 690 pp. $3.00. 

 Ivison, Blakeman, Taylor & Co., Pubs. New York. 



SCRIBNER'S STATISTICAL ATLAS OF THE UNITED 

 STATES : Showing by Graphic Methods their Present Condi- 

 tion, and their Political, Social, and Industrial Development, as 

 Determined by the Reports of the Tenth Census, the Bureau of 

 Statistics, the Commissioner of Education, State Officials, and 

 other Authoritative Sources. 120 Pages Text, 151 plates (31 

 double), 279 Maps (22 folio). 969 Charts and Diagrams. Sold only 

 by Subscription. Descriptive circular sent on application. 

 Charles Scnbner's Sons, Pubs., 743 and 745 Broadway, New York. 



