April i8, 1890.] 



CALENDAR OF SOCIETIES. 

 Philosophical Society, Washington. 



April 13. — J. R. Eastman, Tbe Progress 

 of Meteoric Astronomy; B. G. Wilder, Com- 

 parative Anatomy of the Simian and Human 

 Brain. 



Woman's Anthropological Society of 

 America, Washington. 



April 13. — Clara Bliss Hinds, Some Stud- 

 ies in Child-Life. 



Biological Society, Washington. 



April 19.— W. H. Dall. Exhibition of 

 Original Drawings of the Fur Seal and 

 Steller's Sea Cow, executed by a Member of 

 Bering's Expedition of 1743; C. Hart Mer- 

 riam. Historical Review of the Faunal and 

 Flora Divisions that liave been proposed for 

 North America; Joseph F. James, On Vaii- 

 ation, with Special Reference to Certain 

 Paleozoic Genera; B. T. Galloway, Obser- 

 vations on the Flora of Missouri; C. L. Hop- 

 kins, Characteris ic Vegetation of the Cliff- 

 Dwellers Canon near Flag Staff, Arizona. 

 Boston Society of Natural History. 



April 16.— N. S. Shaler, Climatal Condi- 

 tions of Salt Deposits; Frank Leverelt, Gla- 

 cial Studies bearing on the Antiquity of 

 Man; M. H. Saville, Sanborn Bowlder near 

 Rockport, Mass. 



Wa?its. 



A ?iy person seeking a position /or lukick he is quali- 

 fied by his scientific attainments^ or any person seeking 

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

 of a teacher of science^ cke?ntst, draugkisntan, or -what 

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

 FREE OF COST, if he satisfi.es the publisher of the suit- 

 able character of his application. A ny person seeking 

 information on any sciefttific question, the address of 

 any scientific ?>ian, or who can in any -way use this col- 

 umn for a purpose consonant uoith the nature of the 

 paper ^ is cordially invited to do so. 



WANTED— One or two persons with some means 

 interested in Archaeology to accompany a re- 

 liable antiquarian to Southern Ohio for four months' 

 work in the mounds. The specimens found to be 

 shared equally. For terms address W. K. M., Box 148, 

 Smithsonian Institute, Washington. D. C. 



WANTED— Position to teach Sciences or Mathe- 

 matics by a Smith College graduate who was 

 also a student at the Mass. Institute of Technology. 

 N^ne years' experience. Address T. H., care of 

 Science. 



A YOUNG LADY, graduate of Boston University, 

 also of special course at the Massachusetts In- 

 stitute of Technology, desires a position to teach 

 Chemistry, Physics and Mathematics. Two years' 

 experience. References given. Address Miss B. 

 L., Warren, Mass. 



A YOUNG MAN aged 19, a graduate of Eastman 

 College, wants to serve an apprenticeship with 

 some Manufacturing Electrical Laboratory where he 

 can have access to books ta evening. Is willing to 

 work. The best of references given. C. F. BENE- 

 DICT, P. O. Box 84. Westbury, Wayne Co , N.Y. 



AN experienced College Professor, with consider- 

 able ability in advertising educational institu- 

 tions, now employed, is open to an engagement. 

 Has built up two schools by advertising. Now is 

 just the time to begin work for September opening. 

 "William," 348 East 20th St., New York. 



11 f ANTED by a Cornell University graduate a po- 

 VV sition as Chemist in some Manufacturing 

 establishment. References given. T. B. 



RUPTURE 



cured in stipulated time. 



NO DELAY FROM WORK. NO OPERATION. 



Call or send stamp for circular and reference of those 

 cured. We have on hand over 300 styles of trusses, from 

 $1 up, and suspensories of all kinds. Orders filled by 

 mail or express to any part of the United Stales. 



C. A. M. BURNHAM, M.D.. 



138 Chnton Place, New York. 



SCIENCE. 



LOW-PRICED BOOKS. 



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SCIENCE BOOK AGENCY, 



47 Lafayette Place, New York. 



Agrii 



AGRICUIiTURE;. 



. Drainage. By J. B. Den 



By 



Animal Food Resources of Different N 

 P. L. Simmonds. ,2° 



Coffee and Chiccory. By P. L. Simmonds. 12°. 



Flowers, The Colours of. By Grant Allen. 12° 



Fruits, Selected : Their Culture, Propagation, 

 and Management in the Garden and Orchard. 

 ByC.Downing. 12° 



Gardening for Ladies, and Companion to the 

 Flower-Garden. By Mrs. J. C. Loudon. r^°. 



Hops : Cultivation, Commerce, and Uses. By P. 

 L.Simmonds. 12° 



Horticulture, The Theory of ; or. An Attempt 

 to explain Gardening upon Physiological Prin- 

 ciples. By J. Lindley and A. J. Downing 



Sewage Irrigation by Farmers. By R. W. Birch. 



Use 



E Utilization. By B Latham. S° 



L Animals and their Products. By P. 

 nmonds. 16° . 



architecture: and building 

 constr cction. 



Architecture, the Stepping-Stone to. By 



Tho 



nas Mitchell. 



ind Water Pipes, Kitche 



By H. Grim- 



w. &» 



NG Construction. By Edward J. Burrell. 



nd Steam- 



Chimneys for Furnaces, Fireplaces, 



Boilers. By R. Armstrong, C.E. 18° 



Cooking Range, The. By F. Dye. 12° 



Fires in Theatres. By E M. Shaw. 12° 



Gas Fitter's Guide. By J. Eldi idge. 12° 



Hot-Watfr Apparatus, Fitting. By F. Dye 12° 

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Cooking Appa- 

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Hot-Water Fitting and St 



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 Pump Fitter's Guide. By J. Eldridge. 12°. 

 Strength of Beams under Transverse Load; 



Professor W. Allan. iS" 



Ventilation of American Dwellings. By David 



Boswell Reid, M.D. 12° i 



Ventilation of Buildings. By W. F. Butler. 18° 



ASTRO.VOMV AND NAVIGATION. 



Astronomy for Beginners. By Francis Fellowes. 



i in Elementary. By John 



:-Inch Telescope. By Capt. 



b" 



of the Compass, 



Astronomy, Lesso 

 Merrifield. &°. 



Hours with a Thr 

 William Noble. 



Magnetism and the De 

 By John .Merrifield. 



Navigatio.v, a Treatise on, for the Use of Stu- 

 dents. By John Merrifield. 12° 



Sea-Routfs, The Shortest, and Maps for finding 

 them in a Few Seconds (Great-Circle SailingJ. 

 By John Merrifield. 4° 



Student's Atlas, The. By John Merrifield. 8°.. 



CHEMISTRY. 



Practical Chemistry ; the Principles of Qualita- 

 tive Analysis. By William A. Tilden. 8" . . . . 

 Practical Inorganic Chemistry, An Introduction 

 to; or The Principles of Analysis. By William 



Jago. 8° '. 



Praci ical Organic Analysis, An Introduction to. 



By George E. R. Ellis. 8° 



Experimental Chemistry for Junior Students. 

 By J. E. Reynolds. 



Parti. Introductory 



Part II. Non-Metals 



Part Til. Metals 



Part IV. Chemistry of Carbon Compounds, or 



Organic Chemistry 



Qualitative Analysis and Laboratory Practice, 

 Manual of. By T. E. Thorpe and M. M. Pat- 



1 Muii 



Qualitative Chemical Analysis, A Short Course 

 in. By Professor I. M. Crafts and Professor 

 Charles A. Schaeffer. 12° 



Qualitative Chemical Analysis, An Elementary 

 Manual of. By Maurice Perkins. 12° 



Quantitative Analysis. By H. Carringt( 



Bol- 



QuANTiTATiVE Chemical Analysis. By T. E 

 Thorpe. 18° 



Tables for the Analysis of a Simple Salt for Us. 

 in School Laboratories. ByA. Vinter. h" .. 



EliECTRICITY. 



rrent Machinery. By G. Kapp. 

 J. A. 



namic Eleclricity. By John Hopkinson 

 Schoolbred, and R. E. Day. 18° 



namo-Electric Machines, Recent Prog: 

 By Professor Sylvanus P. Thompson. 1 



FCTRicBells. By F. C. Allsop. 12° 



ECTRic Light Precautions. By ¥ 



Electric Lighting from Central Stations. By 



Forbes 



Electmcal Units, Practical. By J. Swinbur 



Elfctficity, Supply of, by Local Authorities. 



By K. Hedges. 8° 



Electro-Magnetic Telegraph, A Hand-Book of 



the. By A. E. Loring. 18° 



Electro-Magnets. By Th. Du Mor.cel. Tr. by 



C. J. Wharton 



Electro-Telegraphy. By F. S. Beecher. 16°.. 

 INCANDE.SCENT Electrfc Lights, with Particular 



Reference to the Edison Lamps at the Paris 



Exhibition. By Comte Th. Du Moncel, W. 



H. Preece, J. W. Howell, and others. 18°.... 

 Induction Co ls : How Made and How Used. 



18° 



Strength and Diameter of Electric Conductors. 



By G. Forbes. 8° 



TE1.RESTRIAL Magnetism and the Magnetism of 



Irpn Ve'sse's. By Professor Fairman Rogers. 



SANITARY SCIENCE. 



Air We Breathe, the, and Ventilation. By Pro- 

 fessor H. A. Mott. 16° 



Bad Drains, and How to Test them. By R. H. 



Dli 



Dustbii 

 .ulnois. 



nd Sloppy Streets. By H. P. 



Disease and Putrescent Air. By T- Rowan. S".. 



Domestic Filtration of Water. By E. F. B. Den- 

 ton. 8°.... 



Drainage of Towns. By J. Phillips. 8° 



Dwelling-Houses : Their Sanitary Construction 

 and Arrangements. By Profescor W. H. Cor- 

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Fashion in Deformity. By William Henry Flower. 



Food, The 

 Mott... 



nposition, Digestibilily, and Nu- 

 e of. By Professor Henry A. 



, The Laws of. By W. H. Corfield. 8°. . 

 -Science, A Manual of. By Andrew Wil- 



Healthv Foundations for Houses. By Glei 



Brown. 18° 



Hints on taking a House. By H. P. Boulno 



House Drainage and Sanitaiy Plumbing. By W. 

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Maternal Management of Children in Health 

 and Disease. By Dr. Thomas Bull. 12° 



Pneumatic Drainage. By A. Smith. 8° 



Potable Wafer and the Different Methods of de- 

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18°. 



Sanitary Condition of Dwelling-Houses in Town 

 and Country. By George E. Waring, jun. 18''. 



Sanitary Drainage of Buildings, Notes embodying 

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 Cost of Plumbing Work. By W. P. Gerhard, 

 C. E. 18° 



Sanitary Protection. By W. Parry, i." 



Sanitary Works Abroad. By R. Manning. 8".. 



Sanitation, Simplicity in. By E. T. Blake. 8°. 



Sewage, Disposal of. By Maxwell and Tuke. 8°. 



Sewer Gases: Their Nature and Origin. By A. 

 De Varona. 18° 



Sewerage and Sewage Utilization. By Professor 

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Shone Sewerage System. By E. Ault. 8° 



Storage of Water. By J. B. Denton. 8° 



Ventilation, Mechanics of. Bv George W. Raf- 

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Water and Water Supply. By Professor W. H. 

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