^ 



v\ 



SCIENCE 



[Entered at the Poat-Offlce of New York, N.Y., as Second-Class Matter.J 





Ninth Year. 

 Vol. XVIII. No. 447. 



NEW YOEK, August 28, 1891. 



Single Copies, Ten Cents. 

 $3.50 Pek Yeae, in Advance. 



.New 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. 



Tlie American Liglitning Protection Company, 



United Bank Building, Sioux City, Iowa. 



MIMCDmC Cabinet Specimens. Collections. 

 in I ll L n A LO • Fob Blowpipe Analysis. 



Largest and finest stock in U. S. 100pp. Illustrated 

 Catalogue, paper-bound, 15c.; cloth bound, 25c. 

 GEO. L. ENGLISH & CO, Mineralogists, 

 Removed to 733 & 735 Broad-way, New York. 



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, 

 Central High School, Pittsburgh, Pa. 



POSTAL DICTIONARY. 



A Manual of Postage Rates, and Information 

 upon Every Postal Subject which concerns 

 Merchants, Professional Men, Occasional 

 Correspondents, and All who Use the Mails. 

 Sixth edition, revised to date. 

 Arranged in dictionary form, comprising about 150 

 titles (with complete index of over 400 references), 

 designed to furnish all facts bearing upon any par- 

 ticular topic, under its subject title. 



. '"About as convenient a little book as we have seen 

 for some time. Costs only 15 cents, but ought to 

 save at least that amount every other day, directly 

 or indirectly."— Cft-icago Standard. 



"Likely to be of great and constant service to all 

 who make much use of the mails. The ninety-four 

 pages contain a great amount of information, very 

 well arranged, knowledge of which should prevent 

 most of the delays and losses in the mails."— Sos^-" 

 Literary World. - 



"Worth its weight in gold to the busy ' ma 'oS^jg 

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 glauce the points of inquiry 

 are constantly arising." — New York Home Journal. 



"If all who use the mails (and who does not?) will 

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 of the postal authorities will be greatly simplified, 

 fewer mistakes will be possible, and the public will 

 be better served. Its simplicity and low cost will 

 commend it to all. and give it what it deserves, a 

 universal sale." — Hon. Thomas L. James, ex-Post- 

 master General. 



Price, 15 Cents, Postpaid. 



ADDRESS N. D. C. HODGES, 



47 tafayette Place, New York. 



QUERY. 



settle almost ^^9sxinr 



1 postal matters tha,^ ^ /^ffOr^gj^-- - 



PATENTS 



For INVENTORS. 40-page BOOK FREE. Address 

 W. T. Fitzgerald, Attorhey at Law, Washington, D.C. 



n II T C M T J- B. CRALLE & CO., 



rH I til I Washington, D. G. 



ILLUSTRATED HAND-BOOK FREE upon applica- 

 tion. Mention this paper. 



PROTECTION FROM LIGHTNING. 



All the capital desired for the parent company 

 to handle my patents on a new method of protect- 

 ing buildings from lightning has been subscribed. 

 Sub-companies and agencies to introduce the 

 invention are forming, and any desirous of tak- 

 ing State-rights should address The American 

 Lightning Protection Co., Sioux City, Iowa. 



The English patent is for sale, and offers 

 an excellent opportunity for the formation of a 

 company now that the American company is so 

 favorably started. 



N. D. C. HODGES, 47 Lafayette Place, New York. 



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- 

 : nassing through its 

 upper ,&". '^■'fl.'T " 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- 

 nine 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, 



47 LAFAYETTE PLACE, 

 NE^W YORK. 



On Jan. 1st, and at intervals of two months 

 since, has been published the New Zealand 

 Journal of Science, dealing with all branches 

 of natural science, especially in relation to 

 the colony. Subscription (including postage 

 to America), 12s. 6d. per annum, payable to 

 the Editor, care Matthews, Baxter & Co., 

 Bowling St., Dunediu, N. Z. 



