SCIENCE. 



[Vol. XIX. No. 467 



SCIENCE 



ADVERTISING RATES. 



Established January, 1892. 



INSIDE PAGES. 



Per line, agate measure, 14 lines to an inch, 15c. 

 " column, " 140 lines, - $20.00 



'* page, three columns, 420 lines, - 50.00 



LAST OUTSIDE PAGE 



AND PAGES FACING READING 



MATTER. 



jre, 14 lines to an inch, 20c. 



Per line, agate n 

 '* column, " 140 lir 



" page, three columns, 420 li 



60.0 



FIRST OUTSIDE TITLE-PAGE. 



Double-column space at top next Contents, $30.00 

 Triple-column space, below Contents, - 50.00 



SCALE OF DISCOUNTS. 



10 percent, on 4times, i month, or on amount $100 

 15 " '* 8 " 2 " " '* 200 



20 " " 13 " 3 " " " 300 



35 



'26 



33M " "52 " 12 " " " 600 



20 per cent, advance for preferred positions. 



Nothing inserted for less than $1.00 a time. 



Reading Matter Notices- under that caption, 

 30c. a count line, set in nonpareil. 



Copy should be in office not later.than Wednes- 

 day of the week of issue. 



Henry F. Taylor, 



47 Lafayette Place, New York. 



QUERY. 



Can any reader of Science cite 

 a case of lightning stroke in 

 which the dissipation of a small 

 conductor (one-sixteenth of an 

 inch in diameter, say,) has failed 

 to protect between two horizon- 

 tal planes passing through its 

 upper and lower ends respective- 

 ly? Plenty of cases have been 

 found which show that when the 

 conductor is dissipated the build- 

 ing is not injured to the extent 

 explained (for many of these see 

 volumes of Philosophical Trans- 

 actions at the time when light- 

 ning was attracting the attention 

 of the Royal Society), but not 

 an exception is yet known, al- 

 though this query has been pub- 

 lished far and wide among elec- 

 tricians. 



First inserted June 19. No response 

 to date. 



N. D. C. HODGES, 

 874 BROADWAY, NEW YORK. 



PUBLICATIONS. 



A BUSINESS MAN'S HAND-BOOK. 



The report of tlie Postmaster General, juat issued, 

 states that nearly $2,000,000 in checks, drafts and 

 money, reached the dead-letter office during the 

 present year through improper addressing— more 

 than one-half from New York State. Probably 

 double this sum has been lost throug^h delays and 

 accidents resulting from carelessness in mailing 

 and correspondence. To reduce these errors to a 

 minimum, the Government issues THE UNITED 

 STATES OFFICIAL POSTAL GUIDE, in an annual 

 number published iu January, and monthly supple- 

 ments, a book of 900 pages, containing three classi- 

 fied lists of the 66,000 postroffices in the Union, to- 

 gether with postal rules and mail regulations. 

 Every merchant, wholesale dealer, manufacturer 

 and professional man having correspondence, will 

 find the Guide indispensable. It is also of great as- 

 sistance in translating illegible writings to lawyers, 

 printers and others. No establishment where ac- 

 curacy and care are observed as rules is complete 

 without it. The price of the GUIDE in paper is 

 SS.OO, in cloth, $2.50. Orders in New York State 

 should be sent to HOME AND COUNTRY, 93 Maiden 

 Lane, New York; outside of New York Scate to GEO. 

 F. Lasher, 1313 Filbert Street, Philadelphia, Pa. 

 Agents wanted. 



THE 



AMERICAN GEOLOGIST FOR 1891 



AND 



BIEN'S HEW ATLAS OF THE METROPOLI- 



will be given to Slew Subscribers to the 



Geologist for $25.00 (which is the regular 

 price of the Atlas alone) , if ordered through 

 the Geologist. 



For other premiums see the Geologist for 

 Nov., Dec, and Jan. Address 



THE GEOLOGICAL PUBLISHING COMPANY, 



Minneapolis, Ulinn. 



AMERICAN HERO-MYTHS. 



A Stndy In tlie Native Religious of tlie 

 Western Continent, 



By D. G. Brinton, M.D. 8°. $1.75. 



THE CRADLE OF THE SEMITES. 



By D. G. Brinton, M.D., and Morris Jastrow, Jr., 

 Ph.D. 8°. 30 cents. 



N. D. C. HODGES, 874 Broadway, New York 



THE BOTANICAL GAZETTE. 



A monthly illustrated journal of botany in 



all its departments. 



25 cents a number, $2.50 a year. 



^^a-- PUBLISHERS BOTANICAL GAZETTE, 



era ivfordsville, Ind. 



An Illustrated Journal for Mothers 



FUBI.ISHED FORTNIGHTLY. 



$1.00 a year. 



Send for Sample Copy. 



Charles Rohinson, 907 Broadway, N, Y. 



AMERICAN WOODS 



A. book on Woods, 

 actual and autkentic sp< 



tnin 



PREPARATIONS OF WOODS 

 MICROSCOPE AND STERE- 

 nd WOODEN CARDS, for invita- 

 tions, calling cards, etc. Send for circulars. 



R. B. HOUGH, Lowville, N. V. 



PROPRIETARY. 



Consumption carries off 

 many of its victims need- 

 lessly. It can be stopped 

 sometimes ; sometimes it 

 cannot. 



It is as cruel to raise false 

 hopes as it is weak to yield 

 to false fears. 



There is a way to help 

 within the reach of most who 

 are threatened — careful liv- 

 ing and Scott's Emulsion of 

 cod-liver oil. 



Let us send you a book 

 on the subject ; free. 



Scott & Bowne, Chemists, 133 South 5th Avenue, 

 New York. 



Your druggist keeps Scott's Emulsion of cod-liver 

 oil— all druggists everywhere do. $1. 



PUBLICATIONS. 



AND THE 

 BUS? 



*1t\a notonlf the *BiiS7 alan's Ulngi 

 bnt Is especially adapted to the 'Busy 



Qllchtgan Slato Normal 8cboo>. 



BT PLEASES EVERYBODY. 



Miss Frances Willard»— " The bright- 

 est outlook window in Christendom for busy 



people who want to sea what 13 poing on in the world." 



Providence Xelegraiiia-*'A great boon 

 to the busy, the lazy and the economical." 



TUe Congregationalist.-This monthly 

 has no peer in originality of design, scope and 

 accuracy of vision, thoroughness in execution 



.d ability to transform itg readers into citizen!) ol the world.* 



Clucao:o Interiors — "'77:^ Review 0/ Re- 

 •ews, of New York, has come to the rescue of 

 busy people. We know of one /iZp-A railroad 

 oMcial who for a month has worked until 11 

 o clock at night, and yet has kept well informed 

 of current world events. He readsthis Magazine. 

 It gives him a ru nning commentary on important 

 events, besides a digest of the best articles in 

 contemporary magazines." 



Price 25c^ $2.50 a Year. 



AGEXIS WMIED. CLFB HATES ON APPLICATIOIf. 

 Send Ten Cents THE EEVIEW OF REVIEWS, 

 for Sample Copy. 13 Aslor Place, Now \orS. 



minerals, 



Rocks, 



Fossils, 



Casts of Fossils, 



Oeologieal 



ReliefMaps. 



Ward'sNatural Science Establishment 



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



Send for Circular. ROCHESTER, N. Y. 



StufFed Animals \ 

 and Skins, i 



Mounted ^ 



Skeletons, j 



Aicatoniieal | 



models, < 



IiiTcrtebrates 



