11 



SCIENCE. 



[Vol. XVII. No. 422 



CALENDAR OF SOCIETIES. 



Women's Anthropological Society of 



America, Washington. 



Feb. 28. — Alice C. Fletcher, Races in 

 Africa. 



Philosophical Society, Washington. 



Feb. 28.— T. C. Mendenhall, Exhibition 

 and Description of New Pendulum Appara- 

 tus; A. C. True, The Status and Tendencies 

 of the Agricultural Experiment Stations ; 

 George P. MerriU, The World's Nickel- 

 Suppiy; Edward Goodfellow, Biographical 

 Notice of the Late Capt. C. O. Boutelle. 

 New York Academy of Sciences. 



March 2.— J. K. Rees, Remarks on the 

 Reduction of Rutherford Star Plates ; H 

 Jacoby, On the Calculation of Star Places 

 for Zenith Telescope Observations; John 

 Tatlock, Jun., An Index to Copernicus, an 

 International Journal of Astronomy. 



Natural Science Association of Staten 

 Island. 



Feb. 14,— L, P. Gratacap, The Turbid 

 water of the Staten Island Water-Supply 

 Company ; W. T. Davis showed specimens 

 of Linden-trees (Tilia Americana), and read 

 a memorandum in connection with them ; 

 Mr. Davis also contributed entomological 

 notes; Mrs. N. L. Britton, Barbula papu- 

 losa. Muell., as an Addition to the List of 

 Staten Island Mosses published last July ; 

 Dr. N. L. Britton showed leaves of silver- 

 maple infested by a black fungoid growth, 

 which was determined by Mr. J. B. Ellis 

 to be Rhytisma acerinum (Pers.)Fr. ; Joseph 

 C. Thompson noted the capture, last De- 

 cember, of Hydrocantlius irricolor and 

 Hydrophilus nimhatus in a pond, under 

 four inches of ice; apiece of Helderberg 

 limestone, collected by Mr. Arthur HoUick 

 from the drift on Fort Hill, was shown by 

 Mr. Gratacap. 



Boston Society of Natural History. 



March 4.— W. M, Davis, Illustration of 

 the Faulted Monoclinal Structure and Topo- 

 graphic Development of theTriassic Forma- 

 tion of Connecticut by a Working Model; 

 N. S. Shaler, Antiquity of the Glacial 

 Period. 



THE 



Wants. 



Any person seeking a position /or which he is quali- 

 fied by his scientific attainmen's, or any person seeking 

 some one to fill a position of this character^ be it that 

 of a teacher of science, chemist, draughtsman, or what 

 not. may have the ' Want^ inserted under this head 

 FREE OF COST, if he Satisfies the publisher of the suit- 

 able character of his application. A ny person seeking 

 information on any scientific question, the address of 

 any scientific man, or who can in any way use this col- 

 umn for a purpose consonant with the nature of the 

 paper, is cordially invited to do so. 



WANTED— A position to teach Electrical Engi- 

 neering by a student from leading English and 

 French and U. S. science schools, or would accept 

 position as Consulting Electrical Engineer, Electri- 

 cian, etc. Very highest testimonials London & 

 Hartford Publishing Co., N. Y, (International Press 

 Deparrment.) 



WANTED.— A young man in college would like a 

 position during the summer of 1891 in some 

 scientific work, particularly Orinthology, either as 

 an instructor or tutor, or in making collections or 

 accompanying some scientific expedition. Can give 

 good references. Address HUBERT L. CLARK, 

 Amherst, Mass. 



WANTED,— A young man who has been teaching 

 in a flrst-class High School desires a position 

 in a similar institution. Is competent to teach 

 Iilathematics, Latin, Book-keeping, and the English 

 branches. Can give highest references Address H. 

 W MARTHENS, 6208 IJroad St,, Pittsburgh, Pa, 



WANTED.— A situation in a sclentiflc house by a 

 graduate of the scientific department of the 

 Jersey City High School as Geologist, Mineralogist 

 or as assistant teacher in Physics or assistant to a 

 chemist. Best of references, E, W. PERRY, 583 

 Third Street, Jersey City, N, J. 



WANTED,— By a medical student of three 

 courses, a position on some war or mercan- 

 tile vessel sailing between America and some for- 

 eign country, as Clerk, Assistant Physician or Drug- 

 gist, or any respectable occupation. Content with 

 a moderate remuneration. Highest commenda- 

 tions. W. L. S., Science OtB.ce. 



INFORMATION WANTED.— Clarence W. Bowen, 

 Secretary of the Committee on the Centennial 

 of Washington's Inauguration, 251 Broadway, New 

 York, desires information regarding the portraits of 

 John Hathorn and Jeremiah Van Rensselaer, mem. 

 bers of Congress from New York. These portraits, 

 for the Memorial Volume, are particularly desired, 

 to complete the list of portraits ot the New York 

 delegation in Congress at the time of Washington's 

 inauguration. 



WANTED. — One flrst-class instrument-maker. 

 Apply by letter to T. C. MENDENHALL, Su- 

 perintendent U. S. Coast and Geodetic Survey, 

 Washington, D. C 



WANTED.- An Entomologist to accompany a 

 camping party of boys during July next. 

 Address, stating experience and salary expected. 

 ALBERT L, AREY, Free Academy, Rochester, N,Y, 



WANTED,— A young man wishes a position in an 

 experiment station, botanical department pre- 

 ferred. References and evidence of competency on 

 application. Address E E, BOGUE. Agr, Experi- 

 ment Station, Columbus, O. 



COMPANY. 

 98 MILK ST., BOSTON, MASS, 



This Company owns the Letters 

 Patent granted to Alexander Gra- 

 ham Bell, March 7th, 1876, No. 

 174,465, and January 30, 1877, 

 No. 186,787. 



The Transmission of Speech by 

 all known forms of ELECTRIC 

 SPEAKING TELEPHONES in- 

 fringes the right secured to this 

 Company hy the above patents, and 

 renders each individual user of tel- 

 ephones, not furnished toy it or its 

 licensees, responsible for such un- 

 lawful use, and all the conse- 

 quences thereof and liable to suit 

 therefor. 



Exchanges 



[Free of charge to all, if of satisfactory character 

 Address N. D. C. Hodges, 47 Lafayette Place, New 

 York.l 



Will exchange a new Thomson reflecting astatic gat 

 vaiiomeler, about 6,000 ohms, made by Clark, Muir 

 head & Co , London, and costing £30, with 1-9, T-99 

 i-ggg, shunts, lampand gscale, for a Weston voltmete 

 and ammeter, or large Wheatstone bndee, dial pattern, 

 or a portable testing outfit. Address G. A., Science 

 Oflice, 47 Lafayette Place, New York. 



For exchange— Fossil leaves from the Laramie beds of 

 South Table Mountain, near Golden, Col., for oiher fos- 

 sils, historical relics, or minerals. Address John B. Gar- 

 vin, State School of Mines, Golden, Col. 



For Sale or Exchange— All forms and species of Cana- 

 dian birds, mammals, insects, reptiles, fish or other nat- 

 ural history specimens. First class specimens only sup- 

 plied, G, E. Atkinson, 639 Spadina Ave., Toionto, Can, 



1 would like to exchange first six vols, Roscoe and 

 Schorleminer's Chemistry, and Vols, II. and III, of " Ed- 

 ucation " for American Naturalist for 1889 and 1890, or 

 works on Zoology. C. Dwight Marsh, Ripon College, 

 Ripon, Wis, 



I have a good supply of Eastern Coleoptera which I 

 wish to exchange for species not in my collection. Mel- 

 andryidae and Oedemeridae especially desired. Joe C. 

 Thompson, Rosebank P. 0„ Box 73, S, I, 



1 wish to exchange Eastern Lepidoptera for those that 

 I do not have, particularly those found in the South, 

 Jos. F. Crandall, Honesdale, Wayne Co., Pa. 



To exchange, 1890 Seeger and Guernsey Cyclopedia, 

 containing a complete list of the manufactures and pro- 

 ducts of the U, S,, and address of first hands, cost $6. 

 David R. Lewis, Saybrook, 111. 



Chronic Cough Now:! 



j For if you do not it may become con- \ 

 \ sumptlve. For Consuniptioii, Scrofula^ ' 

 J General Debility and Wasting JHseases, I 

 J there is nothing like I 



i SCOTT'S 



Fmulsion 



Of Pure Cod Liver Oil and 



HYPOPHOSPHITES 



It is almost as jjalatable as milk. Far \ 

 better than other so-called Emulsions. 

 A ■wonderful flesh producer. 



Scott's Emulsion 



Tliere are poor imitations. Get the geiiuim 



SCIENCE CLUBBING RATES. 



10^ BISCOUNT. 



"We will allow the above discount to any 

 subscriber to Science who will send us an 

 order for periodicals exceeding |10, counting 

 each at its full price. 



N. D. C. HODGES, 



47 I^afayette Place, fiew York. 



BUSINESS OPPORTUNITY. 



A Manager is wanted for an electric 

 company. A person of experience will 

 learn of a good opportunity by apply- 

 ing to 



N. D. C. HODGES, 



47 Lafayette Place, New York. 



ESTERBROOK'S 

 STEEL PENS. 



Oi SUPERIOR AND STANDARD QUALITY. 

 Leading Nos,: 048, 14, 130, 135, 239, 333 



For Sale by all Stationers. 

 THE ESTERBROOK STEEL PEN CO., 



Works : Oamden. N.J. 26 John St.. New York. 



^TYPEWRITERS. 



Largest like establisbment in tbe world. First-class 

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TYPEWEITEE I to Broadway, New York, 



HEAD&UAETEES, ) l''"' ^^ S*'"« ^*-' Chicago. 



MIUCDIIO Cabinet Specimens, Collections. 

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 GEO. L. ENGLISH & CO, Mineralogists; 

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