The anti-monopolist. [volume] (Saint Paul, Minn.) 1874-1878, 1878-08-15
bare,
And so the poor dog had more.

| And SO the poor dog had more.
Now" he continued, call you've
got to do is to turn this little crank
and grind it out The crank was
turned and the little machine faith
fully repeated the legend of the aged
Mrs. Hubbard. I'm going to make
them with short sermons, Sunday
school hymns and prayers, said Pro-
| fessor Edison, 80 that children may
be instructed while being amused.
and m going t. GIT them upso cheap
| that all can have Them
"Are there any new developments
in the telephone!' asked the writer.
"Oh. keep working away at 1t,
answered the inventor. ''Only an
hour ago Professor Barker. professor
Of physics of the University of Pen
nsylvania, left here after having made
several curious experiments with my
carbon telephone. He made coAnec-
ton betwee n the laboratory here al d
u neighboring house by wire, and
every word could be plainly heard.
| 4 foot step and Il whisper were dis
inctly audible. and we heard Il SEN
| ence uttered in Il low tone 100 feet
| from the telephone.
Mr.. Edison has made several ex-
| periments with this apparatus, and
| has succeeded in measuring the fifty
thousandth part of Il degree Of heat.
Next month Professor Young and
Professor Bracket will 90 to Colorado
to observe the solar eclipse. and the
usefulness Of this instrument for
measuring the heat of the heavenly
| bodies will then be tested for the first
time.
Would you like to see the aero
phone y
An affirmative reply caused the in
ventOr to bring ont from Il corner two
large cone-shaped machines, each
about five feet in length. Their
object is to multiply sound. and
already marvellous results have been
achieved. Conversation has been car
ripd on in the ordinary tone between
erSOns in farmhouse. over a mile
| distant. and the professor standing
at the door Of his laboratory. The
| Professor expresses confidence that
| it will soon be perfect SO that captains
Of vessels at sea can talk with each
other at IL distance OF three miles.
The latest. however. rs we'll as the
most curious of Professor Edison's
| inventions is the megaphone. for
which he has but just filed his caveat.
1t is sort Of sound opera glass. by
means of its use persons partially
deaf are enabled to hear the fanteat
sound with distnc $. 1t concen-
trates and mutiplies the sound in as
aigh Il degree Us is required. BY APP
plYing it to the ear ut i high r..te of
aljustmenta whisper can be distinctly
arard 80 feet away. Already the Pro
lessor has tested it sufficiently to be
satisfied of its entire prlcticahlllty
1t is to he of small size. and have At
tached to it Il rubbtr tube, in the in
vent0rs own words. 1t can he taken
to the theatre 10y person hard Of
hearing just is \ PERSON nea:-sighted
now takes IN opera glass. All You do
IS place it on your lap. let the tube
touch your ear. and all the sounds
come To you magnltied fifty times. If
| necessary. The loudne,s can be reg
dated for the ear rs You regullte il
telescope for the eye.
What is the history Of this inven-
ton I" asked the writer.
"Well. it has Il curious origin.
answered the professor. smiling.
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