New-York tribune. [volume] (New York [N.Y.]) 1866-1924, 1889-09-25
pRAcntcAz Uses or ELECTRICITY.
TWENTY QUESTIONS AND ANSWERS ABOUT
ELECTgIoAL MATTERS.

Tho enterprsing publishers Of "Scrbners Maya
xpes have followed up the Of their series OF
railway articles by beginning In the number for last
June a similar series. by writers of recognized All
thority on the practical applications Of electricity
The subject Is timely. highly Interesting. and IN the
manner OF its treatment quite new. The papers al
ready published and announced for future publication
include Electricity In the Service of Man. by Pro
lessor C. +. Bracket the Telegraph of To-day by
c. j. Buckingham. chief expert OF the western Union
Company; Electricity in Lighting by President
Henry Morton. OF the stevens Institute Of Technology
Electricity in the Household" by A. f. Kennedy.
Of Mr. Edisons laboratory; "Reations of Electricity
10 the Human Body" by DR. NJ Allen Starr: Flee.
iricisy in Warfare by Lieuensnts w. S. Hughes, o..
s. N. and John Mills. U. $ A. the Electric Rail
way" and Electricity in Large Industries" A seriss
of twenty questions and answers Issued by tie pub
fishers is interesting enough TO quote
1. How strong current is used to send message
over Atisnhc cable A.-Thirty cells OF battery
3 What is che longest distance which converse
ton ny telephone IS daily maintained tA.-AbOuS
T5o miles, from Portland. Me-. TO Buffalo, " Y.
s. What Is the fastest sine made by an electric
railway? A mile a minute by small experimental
car Twenty miles an hour on street railway system.
q. How many miles Of submarine cable are there
girdle the earth four times.
8. VIVA. rs tie maximum power generated by an
electric motor? A.Seveny five horsepower; eNptn-
ments Indicate that 100 horsepower Will soon be
reached.
y. HOW Is break IN n submarine caDle IOcaItu
A.-By measuring the electricity needed to charge the
remaining ,tnbroken part
q How many miles Of telegraph wire operation In
the United States? A.-Over a million, or enough to
encircle the globe forty times.
3. How many messages can be transmitted over q
wire at one time? A.-Four, by the Quadrup'ex sys-
tenn IN daily
9. How Is .eegrsphIng nom a moving train accom-
pliShed? Although circuit from the car roof.
inducing current I'm the wire on poles along me
track.
10 What are the most widely separated points be-
tween which 81 is possible ~ send a telegram A
british Columbia and New-Zealand, via America and
Europe.
IL. How many miles of telephone wire in operation
In .he United States? More than 100000 over which
loss, 900 messages sent daily.
IL What Is the greatest candle power OF arc light
used IN Lighthouse! A.-Two million, I'm the light
house at HoustbOlnL Denmark
10. How many persons in the United states are
engaged In business depending solely on eiecrlcity
A.-Estlmated, 100000
IA. How long does II take 20 transmit message
from San Francisco 20 Hon Kong? A.-Abodt III
teen minutes. vie New York, Canso, Pen1snce Alden
IS. Whas is the fastest time made by an operate.
sending messages by the Morse system? A--Abou'
forty-two words minute.
16.-How many telephones are in use In the UhlteH
Statesl About 100000.
II. What vessel has the most complete elec-
trical plant? A.-t1niteG states man-of-war Chicago
is. Whas Is the average cost, per mile. OF trans
10 How many miles Of electric railway are there
10 operation In the United statesY A-Abous 4Oo
miles, and much more under construction
90 What strength Of current is dangerous 20 human
life? Alive hundred volts, but depending largely
physical conditions.