ADVERTISEMENTS. 



Advertised Books of Reference. 



JOURNAL OF THE ELISHA MITCHELL SCIEN- 

 TIFIC SOCIETY. To defray expense of publication this 

 journal is offered at nearly cost. 3 vols. 350 pp. for $1.25. These 

 contain biographies and portraits ttwo of them steel engravings) 

 of Dr. Mitchell, Dr. Curtis and Dr. von Schweinitz, a complete 

 flora and map of the Wilmington Section besides many botanical, 

 chemical, biological, geological and meteorological articles. About 

 75 copies for sale. Address : F. P. Venable, Sec'y, Chapel Hill, 

 N. C. 



ANNALS OF MATHEMATICS. Edited by Ormond Stone 

 and William M. Thornton. Office of Publication : University of 

 Virginia. $2 per vol. of 6 nos. 



THE STANDARD NATURAL HISTORY. By all the 

 leading American scientists. Edited by J. S. Kingsley, Ph.D. 

 Vol. I. Lower Invertebrates. Vol. 11. Crustacea and Insects. 

 Vol. III. Fishes and Reptiles. Vol. IV. Birds. Vol. V. Mam- 

 mals. Vol. VI. Man. 6 vols., nearly 2,500 illustrations and 3,000 

 pages. Imp. 8vo, cloth, $3600; half morocco, $48.00. S. E. 

 Cassmo & Co. (Bradlee Whidden), Publishers, Boston. 



THE BUTTERFLIES OF THE EASTERN UNITED 

 STATES. For the use of classes in zoology and private stu- 

 dents. By G. H. French, A.M. Illustrated by 93 engravings and 

 a map of the territory represented. Large i2mo. Cloth. $2.00. 

 J. B. Lippincott Company, Pubs., Philadelphia. 



LIPPINCOTT'S BIOGRAPHICAL DICTIONARY. A 

 new, thoroughly revised, and greatly enlarged edition. A univer- 

 sal pronouncing dictionary of biography and mythology. Con- 

 taining complete and concise biographical sketches of the eminent 

 persons of all ages and countries. By J. Thomas, M.D., LL.D. 

 Imperial 8vo. 2550 pages. Sheep. $12.00. J. B. Lippincott 

 Company, Pubs.. Philadelphia. 



WILSON. — AMERICAN ORNITHOLOGY; or. The 

 Natural History of the Birds of the United States. By Alex- 

 ander Wilson With a life of the author, by George Ord, F.R.S. 

 With continuation by Charles Lucien Bonaparte (Prince of Mu- 

 signano.) Popular Edition, complete in one volume with 385 

 figures of birds. Imp. 8vo. Cloth, $7.50. Half Turkey mor., 

 $12 50. Porter & Coates. Philadelphia. 



An Old and World-I^enowned 



REMEDY FOR THE 



RELIEF AND OURE OF 

 COLDS, 

 COUGHS, 

 HOARSEf^ESS, 



AND ALL 



^G^ 



Couows 



THROAT TROUBLES. 



Indispensable to Spfiikers 



and Sinifers. 



Foi" sale,pii;i/ in bo.rrs, by all 



Medicine dealer^. 



'phe Travelers Insurance Company 



of Hartford, Conn., organized 1864, issues both Life Policies 

 and A ccident Policies. Only large accident company in America. 

 Only $5 a year to professional and business men for each $1,000 

 insurance, with $5 weekly indemnity. Has paid policy-holders 

 nearly f 1 1, 000,000. All policies non-forfeitable. AH claims paid 

 without discount, and immediately on receipt of satisfactory proof. 



SCIENCE. 



AN ILLUSTRATED WEEKLY JOURNAL. THE 



SCIENCE COMPANY. OWNERS AND 



PUBLISHERS. 



Officers and Director.s.— D. C Oilman, of Baltimore, 

 President; Simon Newcomb, of Washington, U'ice-Presideni; 

 Gardiner G. Hubbard, of Washington ; Alex. Graham Bell, 

 of Washington ; O. C. Marsh, of New Haven ; T. W. Powell. 

 of Washington ; W. P. Trowbridge, of New York ; S. H. ScuD- 

 der, of Cambridge. 



SCIENCE appears every Friday. Volumes begin in July and 

 January. Communications will be welcomed from any quarter. 

 Rejected manuscripts will be returned to the authors only when 

 the requisite amount of postage accompanies the manuscript. 



Address all correspondence to n C^-,,.^ _j, )» 



47 Lafayette Place, New York. 



Subscriptions.— In United States and Canada, $5 a year. 

 In Great Britain and Europe, $6 a year. . 



ADVERTISING RATES: 



I Page I time $30 00 



M Page I time . .^ r8 00 



X Page I time lo 00 



Ys, Page I time 5 00 



For small advertisements the rate will be 15 cents per line, 

 with discounts for continued insertions. For information about 

 special positions, or long time contracts address B. C. EVER- 

 INGHIM, Manager, Advertising Department of Science, 47 

 Lafayette Place, New York City. 



Advertisements must be acceptable i7i every respect. Copy 

 received until Wednesday.^ 10 A. HI. 



SCIENCE is se72t free to those -who advertise in it, as long 

 as advertisement continues. 



WEBSTER'S UNABRIDGED 



"A LIBRARY IN ITSELF." 



The latest issue of this work comprises 



A DBCTSONARY 



containing 118,000 Words, and 3000 Engravings, 



A GAZETTEER OF THE WORLD 



25,000 Titles, with pronunciation, &e., (recently added) and 



A BIOGRAPHICAL DICTIONARY 



nearly 10,000 Noted Persons ; also various Tables, 



AL L IN OWE BOO K. 



It has 3000 more Words in its vocabulary than are found 

 in any other American Dictionary, and nearly three times 

 the number of Engravings. 



It is the best practical Snglisb. Dictionary ex- 

 tant. — Quarterly Review, London. 



Webster is Standard Authority in the Gov't Printing Office, 

 and with the U, S. Supreme Court, and is recommended by 

 the State Sup'ts of Schools in 36 States, and by the leading 

 College Presidents of the U. S. and Canada. 



Published by G. & C. MERRIAM & CO., Springfield, Mass. 



