SCIENCE 



Ninth Yeak. 

 Vol. XVIIL No. 461. 



1 at the PoBt-Offlce of New York, N.Y., as Second-Class Matter.j , 



- <*„>? 



— ^> 



NEW YORK, December 4, 1891. 



IINTERWRAPS, 



Long Cloaks, Jackets, Capes 

 and Mantles, 



OPERA WRAPS, 



Fur Trimmed Jackets and Cloaks. 



WATERPROOF GARMENTS. 



WEW YORK. 



OFWHAT USE IS THAT PLANT? 



Tom caH find the answer in 



SMITH'S "DICTIONARY OF 

 ECONOMIC PLANTS." 



Sent postaid on receipt of $2.80. Publish- 

 er's price, $3.50. 



SCIENCE BOOK AGENCY, 



874 Broadway, Neir York. 



JUST PUBLISHED. 



THE LABRADOR COAST. 



A JOURNAL OF TWO SUMMER CRUISES 



TO THAT REGION. 



WITH NOTES ON ITS EARLY DISCOV- 

 ERY, ON THE ESKIMO, ON ITS PHY- 

 SICAL GEOGRAPHY, GEOLOGY AND 

 NATURAL HISTORY, TOGETHER WITH 

 A BIBLIOGRAPHY OF WORKS, ARTI- 

 CLES, AND CHARTS RELATING TO 

 THE CIVIL AND NATURAL HISTORY 

 OF THE LABRADOR PENINSULA. 



By ALPHEDS SPRING PACKARD, ffl.D., Ph.D. 



Sportsmen and ornithologists will be interested in 

 the list of Labrador birds by Mr. L. W. Turner, 

 which has been kindly revised and brought down to 

 date by Dr. J. A. Allen. Dr. S H. Scudder has con- 

 tributed the list of butterflies, and Prof. John 

 Macoun, of Ottawa, Canada, has prepared the list of 

 Labrador plants. 



Much pains has been taken to render the bibliog- 

 raphy complete, and the author is indebted to Dr. 

 Franz Boas and others for several titles and impor- 

 tant suggestions; and it is hoped that this feature of 

 the book will recommend it to collectors of AnieH- 

 cana. 



It is hoped that the volume will serve as a guide 

 to the Labrador coast for the use of travellers, 

 yachtsmen, sportsmen, artists, and naturalists, as 

 well as those interested in geographical and histori- 

 cal studies. 



513 pp., S"", ^3.50. 



N. D. C. HODGES, Publisher, 



874 Broadway, New York. 



a:y /fetfV - Ten Cents. 

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Course of Mineralogy for Young People. 



Conducted by correspondence ; minerals and books 

 furnished. 



Collection and book, "First Grade," one dollar; 

 postage, 25 cents. Send for circulars to 



GUSTAVE GUTTENBERG, 

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nd finest stock in U. S. 100pp. Illustrated 

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 GEO. L. ENGLISH & CO, Mineralogists, 

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INSECTS AND INSECTICIDES. 



A PRACTICAL MANUAL, 



Concerning Noxious Insects and the Methods 

 of Preventing their Injuries. 



By CLARENCE M. WEED, 



Professor of Entomology and Zoology, New 

 Hampshire State College. 



WHAT IS SAID ABOUT IT. 



" I think that you have gotten together a very 

 useful and valuable little book.""— Dr. C. V. Riley, 

 U. S. Entomologist. Washington, D. C. 



"It is excellent."'— James Fletcher, Dominion En- 

 tomologist, Ottawa, Canada. 



" I am well pleased with it."— Dr. F. M. Hesamer, 

 Editor America7i Agriculturist, New York. 



"It seems to me a good selection of the matter 

 which every farmer and fruit grower ought to have 

 at his immediate command."— Prof. S. A. Forbes, 

 State Entomologist of Illinois, Champaign. 111. 



" A good book, and it is needed."— Prof. L. H. 

 Bailey, Cornell University. 



"It is one of the best books of the kind 1 have 

 ever seen."— J. Freemont Hickman, Agriculturist, 

 Ohio Experiment Station, Columbus, Ohio. 



"I shall gladly recommend it."— Prof. A. J. Cook, 

 Michigan Agricultural College. 



Price, $1.25. 



Sent postpaid to any address on receipt of price. 



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



PHYSICAL, MEASUREMEIVT. 



By HiROLD Whiting, Ph.D., formerly instructor. 

 Harvard University. New Edition, 8vo, l,as6 pages, 

 $3.75. D. C. HEATH & CO , Pu'clishers. Boston. 



iVew Method of Protecting Property 

 from Lightning. 



The Lightning Dispeller. 



Price, $20 to $30.— According to size. 



The Patent Lightning Dispeller is a conduc- 

 tor specially designed to dissipate the energy 

 of a lightning discharge, — to prevent its 

 doing harm, — placing something in its path 

 upon which its capacity for causing damage 

 may be expended. 



No recorded case of lightning stroke has 

 yet been cited against the principle of the 

 Dispeller. So far as known, the dissipation 

 of a conductor has invariably protected under 

 the conditions employed. 



Correspondence solicited. 



AGENTS WANTED. 



The American Lightning Protection Company, 



United Bank Building, Sioux City, Iowa. 



QUERY. 



Can any reader of Science cite 

 a case of ligfitning stroke in 

 wliich tfie dissipation of a small 

 conductor (one-sixteentli of an 

 inch in diameter, say,) tias 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. 



