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SCIENCE 



lEntered at the Poat-Offlce of New York, N.Y., as Second-Class Matter.] 



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Ninth Yeak. 

 Vol. XVIII. No. 453. 



NEW" YORK, October 9, 1891. 



Single Copies, Ten Cents. 

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jDtoaDwaii ckj) \^w> <5t. 



WEW YORK. 



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. 



N^m 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 strike has 

 yet been cited against the princip'^*-^ +he 

 Dispeller. So far as known, the i* *■»>, 

 of a conductor has invariably protecteu ' /^ 

 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 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, 



47 LAFAYETTE PLACE, NEW YORK. 



