il 
SCIENCE. 
Vol. XXIII. No. 575 
Probably you take 
THE 
Electrical Engineer. 
Most people interested in Electricity 
do. 
If you do not, now is a good time to 
begin. 
It is published every Wednesday. 
Subscription, $3.00 per year. 
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Address: 
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THE 
AMERICAN 
JRIGUIG ]PebselslONs 
COMPANY, 
125 Milk Street, 
Boston, Mass. 
This company owns Let- 
ters-Patent No. 463,569, 
granted to Emile Berliner 
November 17, 1891, fora 
combined telegraph and 
telephone, and controls 
Letters-Patent No. 
AVA 225, Granted to 
Thomas A. Edison May 
3, 1892, for a speaking 
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cover fundamental inven- 
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transmitters and of car- 
bon telephones. 
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HANDY BOOKS. 
PRACTICAL ELECTRICS, a universal handy book 
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ELECTRICAL TABLES AND MEMORANDA for 
Engineers, by Silvanus P. Thompson, 128 pages, Illus- 
trated, 64mo, roan, 50 cents. 
A SYSTEM OF EASY LETTERING, by Howard 
Cromwell, 32 different styles, 50 cents. 
THE ORNAMENTAL Penman’s pocketbook of alpha- 
bets, 37 different styles, 20 cents. 
Books mailed post paid to any address on receipt of 
publish price. 
SPON & CHAMBERLAIN, 
Mention this paper. 12 Cortlandt Street, N.Y. 
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 
interest also on account of descriptions given 
of the insects found embedded in these long- 
preserved exudations from early vegetation. 
By CLARENCE LOWN and HENRY BOOTH: 
Wee ERG 
ON. D. C. HODGES, 874 Broadway, N. Y. 
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N. D.C. HODGES, 874 Broadway, N. Y. 
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