u 



SCIENCE. 



[Vol. XVII. No. 428 



CALENDAR OF SOCIETIES. 



Anthropological Society, Washington. 



April 7. — Lester F. Ward, Are the Ac- 

 quired Mental Faculties of Man Hereditary? 



Philosophical Society, Washington. 

 April 11.— J. P. Iddings, The Rocks of 

 Obsidian Cliff, National Park ; J. W. Powell, 

 Evolution of Industry. 



Boston Society of Natural History. 

 April 15. — R. R. Andrews, The Devel- 

 opment of the Enamel of the Teeth (illus- 

 trated by the stereopticon). 



SPRING WRAPS, 



JACKETS, SUITS, 



London and Paris Styles by last 

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NEW TORK. 



A TEMPORARY BINDER 



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This binder is strong, durable and 

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OFWHAT USE IS THAT PLANT? 



Tou can find the answer in 



SMITH'S "DICTIONARY OF 

 ECONOMIC PLANTS." 



Sent postaid on receipt of $3.80. Publish- 

 er's price, $3.50. 



SCIENCE BOOK AGENCY, 



47 Lafayette Place^ New York 



Wants, 



A 7iy person seeking a position /or ■which he is quali- 

 fied by his scientific attainments^ or any person seeking 

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

 of a teacher of science^ chemist^ dratig-htsinan. or uuhat 

 not. 7nay have the ' JVa?tt' inserted under this head 

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 any scientific i7iany or -who can in any -way use this col~ 

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Pape: 



r cordially invited to do j 



WANTED—A position in some College, Normal 

 School or Academy to teach Biolofry, Physiol- 

 ogy, Comparative Anatomy, Histology, Embryology 

 or Botany. A graduate of the University of Wiscon- 

 sin. Have had four years'" experience as a teacher. 

 Address "BIOLOG-IST,"' care Science. 



WANTED.— All of Vol. I. of Journal of Analytical 

 Chemistry, published at Easton, Penn. State 

 price and condition. Science Book Agency, 47 

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WANTED— A position in a Summer School of 

 Gymnastics to teach any one or more of the 

 following named physical exercises, viz.: Fencing 

 (to ladies especially), Sparring, Club Swinging, 

 "Wands, Chest Weights and Free Movements. Am 

 prepared to offer very favorable terms to any school 

 desiring such work. WILLIAM FINDLAY, Propri- 

 etor of Phiia. Inst, of Phys. Cult., 1009 Arch Street, 

 Philadelphia, Pa. 



A COLLEGE GRADUATE— has had four years' 

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 works— desires position in chemical works, oil re- 

 finery, or paint works, or in any position where 

 a technical chemist is needed. Address " CHEM- 

 IST," care Science. 



A HARVARD M.A., especially interested in Nat- 

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 door occupation for the summer. Remuneration a 

 secondary object. SUMMER, Science Office. 



A CHEMIST, taking P. G. work in the Scientific 

 Department of one of our best colleges, would 

 like to negotiate for some industrial position, where 

 his knowledge would be of avail. Can furnish best 

 of references. R. S. W.. Box 691, Amherst, Mass. 



WANTED— A position to teach Electrical Engi- 

 neering by a student from leading English and 

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 position as Consulting Electrical Engineer, Electri- 

 cian, etc. Very highest testimonials. London & 

 Hartford Publishing Co., N. Y. tinternational Press 

 Department.) 



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 first-class High School desires a position 

 in a similar institution. Is competent to teach 

 Mathematics, Latin, Book-keeping, and the English 

 branches. Can give highest references Address H. 

 W. MARTHENS, 6208 Broad St.. Pittsburgh, Pa. 



Exchanges. 



[Freeof charge to all, if of satisfactory character. 

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

 York,] 



Will exchange a new Thomson reflecting astatic gal- 

 vanometer, about 6,000 ohms, made by Clark, Muir- 

 head &Co., London, and costing £30, with 1-9, i-gg, 

 1-999, shunts, lampand jscale, for a Weston voltmeter 

 and ammeter, or arge Wheatstone bridge, dial pattern 

 I portable testing outfit. Address G. A., Science 

 Office. 47 Lafayette Place, New York. 



For exchange— Fossil leaves from the Laramie beds of 

 outh Table Mountain, near Golden, Col., for other fos- 

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

 in, State School of Mines, Golden, Col. 

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

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

 ural history specimens. First class specimens only sup- 

 pHed. G. E. Atkinson, 639 Spadina Ave., Toronto, Can. 

 would like to exchange first six vols. Roscoe and 

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

 ion " 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. O., Box 73, S. I. 



Bermuda BottSed. 



"You must so to Bermuda. If 

 I you do not I wlU not be responsl- 

 ) nle for the consequences." " But 

 I doctor, I can afford neither the 

 1 time nor the money." " Well, if 

 i that Is impossible, try 



SCOTT'Si 



Fmulsiow 



OF PURE NORWEGIAN 

 COD LIVER OIL. 



I sometimes call it Bermuda Bot- 

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Bronchitis, Cough 



OF Severe Cold 



, I have CSJHED witBi it; and the 

 aiSvantage is tBiat the most sens!- i 



. tive stomaclt can take it. Another i 

 I tiling which commends it is tlie | 

 I stimulating properties of the Hy- i 

 j popliosjjhites which it contains 1 

 ■ "STou will And it for sale at your I 

 ) fflnigsist's tout see you get the i 

 original SCOTT'S Ei»IUS.SJOW." I 



Protection from Lightning 



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To dissipate the energy of a lightning dis- 

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Correspondence solicited. 



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THg DOLLAR TYPFWRITFB 



the same quality of work; takes a fools cap sheet- Comple-- 

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 roll; nses copying ink; in fact it does all of the work of 

 a hi2;Ii priced machine. Speed, 15 

 Size. 3x4x9 inches; weight, 12 oz; ] 

 Satisfaction guaranteed: Circulars *i. 

 Sent by express for SI. 00; by malL 

 R. H. INGLRSOLL&BRO., CoCORTt, 



JVIinerals, 



Rocks, 



Fossils, 



Casts of Fossils, 



Oeological 



Relief Maps. 



Ward'sNaturalScienceEstablishment 



Mineralogy, Geology, Paleontology, Zoology, Osteology, Anatomy. 



Send for Circular. ROCHESTER, N. Y. 



SttilTed Animals 



and Skins, 



Mounted 



Skeletons, 



Anatomical 



Models, 



Invertebrates. 



