September 22, 1893.] 



ently out of their element, going to prove that at some 

 remote period the present lake bed was simply a part of 

 the sea bottom, which was thrown up by volcanic action 

 with the supernatant water and its inhabitants. 



In the Escondido River, which enters the sea on the 

 Mosquito Coast, Sir. Eichmond found sharks as far up as 

 De Kama, sixty-five miles from its mouth. During the 

 dry season, a period of very brief duration, the water is 

 brackish at high tide at this distance. Several sharks, 

 from two to four feet long, were caught here while the 

 water was perfectly fresh. It is not known, however, 

 that these were of the same species as those inhabiting 

 the lake. Hugh M. Smith. 



U. S. Fish Commission, Washington, D. C. 



AMONG THE PUBLISHERS. 



Messrs. D. AppLETOJf '& Co.'s preliminary autumn an- 

 nouncements include the following books : " The Creden- 

 tials of Science the Warrant of Faith," by Prof. Josiah 

 Parsons Cooke ; " Factors in American Civilization," a 

 series of fourteen popular lectures before the Brooklyn 

 Ethical Association ; " The Personal Recollections of Wer- 

 ner von Siemens ;" "The Development of Mind in the 

 Child," by Professor W. Preyer, of the University of Jena, 

 a new volume in the International Education Series. 



— Messrs. Longmans, Green & Co.'s announcements in- 

 clude: "Eskimo Life," by Fridtjof Nansen, author of 

 "The First Crossing of Greenland;" translated by Wil- 

 liam Archer; "Madoc: An Essay on the Discovery of 



SCIENCE. 167 



America by Madoc ap Owen Gwynedd in the Twelfth 

 Century," by Tbomas Stephens; edited by Llywarch Rey- 

 nolds, J3. A, Oson; "The Ruined Cities of Mashonaland:" 

 being a record of excavation and exploration in 1891, by 

 J. Theodore Bent, P. S. A., F. R. G. S.; "Discovery of 

 Lakes Rudolf and Stefanie:" account of Count Samuel 

 Teleki's exploring and hunting expedition in Eastern 

 Equatorial Africa in 1887 and 1888, by his companion, 

 Lieut. Ludwig von Hohnet; translated by Nancy Bell 

 (N. D'Anvers); "Heat," by Mark R. Wright; "Elementar'" 

 Algebra," with numerous examples and exercises, by Rob- 

 ert Graham; "A Manual of Machine Drawing and Design," 

 by David Allan Low; "Manual of Bacteriology," for prac- 

 titioners and students, with especial reference to practical 

 methods, by Dr. S. L. Schenk; "Diseases and Injuries of 

 the Teeth," including pathology and treatment: a manual 

 of practical dentistry for students and practitioners, by 

 Morton Smale, M. R. C. S. ; "Essentials of Chemical Physi- 

 ology," by W. D. Halliburton, M. D., F. R. S.; "Statics 

 and Dynamics," by C. Geldard, M. A.; "A Dictionary of 

 Api^lied Chemistry," by T. E. Thorpe; "Life with Trans- 

 Siberian Savages," by B. Douglas Howard; "Out of Doors 

 in Tsarland:" a record of the seeings and doings of a 

 wanderer in Russia, by Fred. J. Whishaw; "Primitive 

 Music:" an inquiry into the origin and development of 

 music, songs, instruments, dances and pantomimes of sav- 

 age races, by Richard Wallaschek; "Where Three Emj^ire* 

 Meet:" a narrative of recent travel in Kashmir, Western 

 Tibet, Baltistan, Ladak, Gilgit and the adjoining coun- 

 tries," by E. F. Knight. 



Horsford's Acid Phosphate 



Is the most effective and agreeable 

 remedy in existence for preventing 

 indigestion, and relieving those dis- 

 eases arising from a disordered 

 stomach. 



Dr. W. W^ Gardner, Spring- 

 field, Mass., says, "I value it as an excel- 

 lent preventative of indigestion, and a 

 pleasant acidulated drink when proper- 

 [y diluted with water, and sweetened." 



Descriptive pamphlet free on application to 



RUMFORD Chemical Works, Providence, R. I. 



Beware of Substitutes and Imitations. 



For sale bj' all Druggists. 



[Free of charge to all, if of satisfactory character. 

 Address N. D. C. Hodges, 874 Broadway, New 

 York.] 



For a rare chance to get a first-class microscopic- 

 al outfit write for full particulars to box 125, Sel- 

 lersville, Bucks Co., Pa. 



For sale or exchange.— A fine collection of Lep-- 

 idoptera, native and exotic. For particulars ad- 

 dress Addison Ellsworth, Binghamton, N. Y., care 

 Republican. 



For sale or exchange for works on entomostraca, 

 WoUe's "Desmids of the U.S.," Hentz "Spiders of 

 the U. S.," The Amer. Entomologist & Botanist, 

 Vol. 2, The Amer. Entomologist, Vol. i, Harris's 

 "Insects Injurious to Vegetation,'' colored plates, 

 copy formerly owned by Townend Glover. C. 

 Dwight Marsh, Ripon, Wis. 



"The Conchologist : a Journal of Malacology," 

 Vols. I and 2, with wood cuts and plates, value 12 | - 

 will exchange for any works or pamphlets on Amer- 

 ican Slugs or Anatonry of American Fishes. W. E 

 Collinge, Mason College, Birmingham, England 



Exchange— The undersigned is desirous of ob- 

 taining correspondents interested inmacro-lipidop- 

 tera, in Alaska, the far Western, Southwestern 

 and Southern States. Will also exchange rare 

 lepidoptera for entomological literature. Levi W. 

 Mengel, Reading, Penn. 



Wanted to exchange— Medical books. Obstetri- 

 cal Transactions, London, Works of Sir J. Y. 

 Simpson, Beck's Medical Jurisprudence. Hand- 

 book for the Physiological Laboratory, by Burnton, 

 Foster, Klein and Sanderson, Quain's Anatomy, 

 and about fifty others. Catalogues given. Want 

 Geological, Botanical and Microscopical books in 

 exchange. Dr. A. M. Edwards, 11 Washington St. 

 Newark, N J. 



pOR SALE.— Volumes V. and VI. of the "Explor- 

 *• ations for a Railroad Route from the Missis- 

 sippi River to the Pacific," 1857, half calf, in good 

 condition; a large number of colored and uncolored 

 plates of Mammals, Birds, Fish, etc., etc. On 

 receipt of $7.00 will send to any ordinary point in 

 the U. S., express paid. These volumes are now 

 rare. Address Dr. Shufeldt, Takoma Park, Dist. of 

 Columbia. 



A YOUNG woman who has been an assistant for 

 '*■ a literary and scientific man desires a similar 

 position. Is an experienced and accurate stenog- 

 rapher and typewriter, thoroughly educated, and 

 suflJciently familiar with literary work to write, in- 

 dependent of dictation. Has some knowledge 

 of the Spanish language. Will go to any part of the 

 Box 147, Ravenna, Ohio 



United States. Addre 



A GRADUATE of an American Polytechnic insti- 

 '^ tution and of a German University (Gottingen), 

 seeks a position to teach chemistry in a college or 

 similar mstitution. Five years experience in 

 teaching chemistry. Address Chemist, 757 Cary St. 

 Brockton, Mass. 



\J7ANTED.— A position as teacher of Bioloery, by 

 "'* an experienced teacher, a college graduate 

 with four university post-graduate courses in the 

 Sciences. Good endorsements, and eighteen years' 

 experience. Address A. N. Somers, La Porte, Ind. 



\X/ ANTED.— Assistant in Nautical Almanac office, 

 »' Navy Department. The Civil Service Com- 

 mission will hold an examination on August 15 to 

 fill a vacancy in the position of assistant (computer) 

 in the Nautical Almanac office. The subjects will 

 be letter-writing, penmanship, trigonometry, rudi- 

 ments of analytical geometry and calculus, loga- 

 rithms, theory and practice of computations, and 

 astronomy. Each applicant must provide himself 

 with a five-place logarithmic table. The examina- 

 tion will be held in Washington, and if applications 

 are filed in season, arrangements mav be made for 

 examinations in the large cities. iJlanks will be 

 furnished upon application to the Commisfcirn at 

 Washington. 



