342 



SCIENCE. 



[Vol. XIV. No. 354 



DAFT ELECTRIC LIGHT COMPANY. 



Power Stations. . „ -^^ T'r- Electric Railways. 



Stationary Motors 

 ^2 to 100 H.P. 



Car Motors 15 to 

 250 H.P. 



Executive Office, 1 15 Broadway, N.Y 



FACTORY, JERSEY CITY, N. J. 



Please Mention "Science.' 



CALENDAR OF SOCIETIES. 



Anthropological Society, Washington. 



Nov. 5. — Romyn Hitchcock, The Shinto 

 Faith ; O. T. Mason, Anthropology at the 

 Paris Exposition. 



Philosophical Society, Washington. 



Nov. 9. — Asaph Hall, Saturn and its 

 Ring ; C. E. Dutton, Remarks on Irrigation 

 in the Arid Region. 



Appalachian Mountain Club, Boston. 



Nov. II. — C. W. M. Black, Stony Man 

 Mountain, the Pride of Blue Ridge ; Frank 

 O. Carpenter, The Great Smoky Mountains 

 and Thunderhead Peak. 



Engineers' Club, St. Louis. 



Nov. 6. — Mr. Winthrop Bartlett presented 

 an informal paper on the " Olive Street Cable 

 Road." The total length is 9 5 miles. The 

 conduit is 39 inches deep. The Johnson 

 rail, weighing 65 pounds to the yard, is used. 

 The speaker gave the particulars of numer- 

 ous details of construction. The road was 

 built at the rate of 274.2 feet per day, count- 

 ing every day between the time of starting 

 and finishing. Interesting information on 

 the subject of the horse-power required un- 

 der varying conditions of service was given. 

 The enormous fluctuations of power were 

 shown by an indicator card, in which the 

 power varied from 136 horse-power to 609 

 horse-power within one minute. The per- 

 centage of power required to drive the cable 

 only, as compared with the total power used, 

 was about 50 per cent, much lower than on 

 other roads. A number of practical points 

 of experience were explained, with details of 

 improvements that had been made. Messrs. 

 Russell, Johnson, Seddon, and Hubbard took 

 part in the discussion of this paper. The 

 hour being late, it was ordered that Professor 

 Potter's paper on " Fuel Gas " be made the 

 special order of the next meeting, Nov. 20. 



iof 



tific value of any 



glad to exchange for spi 



kind. I would also like lo correspond 



ested in the collection, sale, or exchange of Indian relics.- 



D. E. Willard, Albion Academy, Albion, Wis. 



Will exchange '• Princeton Review " for 1883, Hush 

 Miller's works on geology and other scientific works, for 

 back numbers of " The Auk," "American Naturalist." 

 or other scientific periodicals or books. Write.— J. M. 

 Keck, Charrion, Ohio. 



I wish to exchange Lepidoptera with parties in the 



outhe 



end 



for those found in other localities. "—P. C. Truman, 

 Volga, Brookings Co., Dakota. 



Shells and curiosities for marine shells, curiosities or 

 minerals address W. F. Lerch, No. 308 East Fourth St., 

 Davenport, low.t. 



A collection of filty unclassified shells for the best offer 

 in bird skins ; also skins of California birds for those of 

 birds of other localities. Address Th. E. Slevin, 2413 

 Sacramento St., San trancisco. Cal. 



I have forty varieties of birds' eggs, side blown, first 

 class, in sets, with full data, which I will exchange for 

 books, scientific journals, shells, and curios. Write me, 

 ■stating what you have to offer. — Dr. W. S. Strotje, 

 Bernadotte, Fulton County, III. 



I want to correspond and exchange with a collector of 

 beetles in Texas or Florida. — Wm. D. Richardson, 

 P.O. Box 223, Fredericksburg, Virginia. 



too botanical specimens and analyses for exchange. 

 Send list of those desired and those which can be fur- 

 nished, and receive a similar list in return. Also cabinet 

 specimens and curiosities for the same. Scientific corre- 

 spondence' solicited. — E. E. Bogue, Orwell, Ashta. 

 County, O. 



I will sell to chapters or individual members of the 

 Agassiz Association, 25 fine specimens of fossil plants 

 from the Dakota group (cretaceous), correctly named, for 

 $2.50. Send post-office order to Charles H. Sternberg 

 (author "Young Fossil-Hunters"), 1033 Kentucky 

 Street, Lawrence Kan. 



Exchanges 



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

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

 York.l 



Morris's "British Butterflies," Morris's "Nests and 

 Eggs of British Birds," Bree's "Birds of Europe" (all 

 colored plates), and other natural history, in exchange 

 for Shakesperiana ; either books, pamphlets, engravings, 

 or cuttings. — J. D. Barnett, Box 735, Stratford, Canada. 



I have Anodonia opahna (Weatherby), and many 

 other species of shells from the noted Koshkonong Lake 

 and vicinity, also from Western New York, and fossils 

 from the Marcellus shale of New York, which 1 would be 



Enjoy It. 



SCOTT'S 

 cMULSIuil 



of pure Cod Uver Oil with Hypo- 

 phosphites of Lime and Soda is 

 almost as palatable as milk. 

 Children enjoy It rather than 

 ■ otherwise. A MARVELLOUS FLESH 

 I PRODUCER it Is indeed, and the 

 I little lads and lassies who take cold 

 I easily, may be fortified against a 

 [ cough that might prove serious, by 

 ; taking Scott's Emulsion after their 

 ! meals during the winter season. 

 lieu-are of suhstituiioiis atid imitations. 



NOW IN PRESS. 



"FORT ANCIENT." 



A large work of 200 pp. with 36 full-page illustra- 

 tloDP on tlie greatest of all Ohio Valley Earthworks, 

 aud similar eDclosures, 



By Warren K. Moorehead, assisted by scientists 

 from Washington. 



It IS compiled from a careful survey and is correct 

 in all details. 



The entire summer was speni in surveying, exca- 

 vating, photographing and preparing this work. 



Fort Ancient consists of 18,712.2 feet of embank- 

 ment, and in size, state of preservation and Impor- 

 tance as an aboriginal fortification is unequalled In 

 this country. 



Price of book, $3 00. 



It will be ready for sale Dec. 1st. 



Illustrated prospectus mailed free to any address. 

 Send for one. 



WARREN K. MOORE HEAD, 

 Smithsonian Institution, Washington, D.C. 

 Published by Robt. Clarke & Co , Cincinnati. 



0/d and Rare Books. 



Catalogue No, 29 nearly ready. Will contain 

 many scarce works pertaining to Natural His- 

 tory, Americana, out of print books, as a whole, 

 inleresting. 



A. S. CLARK, 



34 Park Row, New York City. 



)ACK NUMBERS and complete sets of leading Mag- 

 J azines. Rates low. AM. MAG. EXCHANGE, 

 Schoharie, N.Y. 



Schools. 



Prepares for Smith and Wellesley, and admits 

 Vassar by Certificate. Circulars. Early- application 

 necessary. 



M 



iIicHiG..\N, Houghton. 

 ICHIGAN MINING SCHOOL. — For Catalogues 

 address M. E. Wadsworth, A.M., Ph.D., Director. 



CHANCE FOR ALL 



To Enjoy a Cup of Perfect 

 Tea. A TRIAL ORDER of. "J^ 



pounds of Fine Tea. either Oolong. Ja- 

 pan, Imperial, Gunpowder. Young Hy- 

 son, Mixed. English Breakfast or Sun 

 Sun Chop, sent by mail on receipt or 

 S2.00. Be particular and statewhat Icind 

 of Ti a you want. Greatest inducement 

 eTer ( fft rt d to get orders for onr cele- 

 bi-Hted Tt'as, Coffees and Eat inp: Powder. For full particu- 

 Ini-s address THE QEEAT AMERICAN TEA CO. 

 P. O. Box 289. 31and33 Vesey St., New York. 



PATENT V; R E N C H 

 AND SCREW DRIV£:K COMBINED. 



Turns Kuts, Gas Burners or Pipe without adjustment. 

 Made of Best Polished Steel. Sent by ninil lor 25 ets. 

 CuiKLES U. Ely, p. O. Box 1945, New Y'ork City. 



