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N. D. C. HODGES, Publisher, 



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[Vol. XXI. No. 542 



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- 

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 explained (for many of these see 

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 an exception is yet known, al 

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First inserted June 19, 1891. 

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