il 
2) SCUEINCIE. 
Vol. XXIII. No. 578 
Probably you take 
THE 
Electrical Engineer. 
Most people interested in Hlectricity 
do. 
If you do not, now is a good time to 
begin. 
It is published every Wednesday. 
Subscription, $3.00 per year. 
You can try it three months for fifty, 
cents. 
Address: 
©The Electrical Engineer, 
203 Broadway, - - - New York. N Y¥ 
QUERY: 
Can any reader of Sczence 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? sPlenty 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, 1891. No re- 
sponse to date. 
N. D. €. HODGES, 874 BROADWAY, N. Y. 
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THE ORNAMENTAL Penman’s pocketbook of alpha- 
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Books mailed post paid to any address on receipt of 
BUILDING 1893 Catalogue 
BOOKS. | Painting sand bee uding, 
also Catalogue of Draw- 
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- DRAWING 
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FOSSIL RESINS. 
This book is the result of an attempt to 
collect the scattered notices of fossil resins, 
exclusive of those on amber. The work is of 
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