The Richmond palladium and sun-telegram. [volume] (Richmond, Ind.) 1907-1939, 1922-09-05

A crystal that instead of being used 4
as a rectifier, will serve as a source
of current, is one of the developments I
of chemist. A. NJ. Nicholson of the I
Western Electric, who is experiment |
ing with the manufacture and uses of
crystals in radio.
The Curies, famous for their discov-
cries of the properties of radium, also
found that certain crystals on being
put under pressure, would give off an
electric current, and would absorb
electricity again when the pressure
was removed, exactly like a sponge in /
a pan of water. Mr.. Nicholson is car
rying his investigation-furthe in test
| ing different crystals and measuring
their comparative electrical strength.
/ Only few sugar and salt crystals
have been tested yet, and hundreds
more of the various crystals remain.
/ As high as 500 volts, measured by a
voltmeter, has been obtained from
/ large crystal under pressure. Although
the crystals cannot be used as thefor-
binary crystal detector is used, prac-
teal use was found for them during
the war in submarine detector, for
which they furnished the current.
Eliminating Stats.
The drain coil developed by the Sig
nal Corps and announced as its means
of reducing summer static, according
to an explanation in Popular Radio"
consists of a resonance coil which is
inserted between the aerial and the
receiving set. A ring slipping along
/ the length of the coil, which is wound
with No. 80 wire, serves to tune it to
the different wave lengths. Any wave
length up to 1900 meters can be heard.
/ Radio Car at Fairs.
/ A Mitchell automobile, equipped
with receiving set operated as an
advertising device, attracted much at
tention at the Ohio State fair. With
an aerial mounted above it and set
installed in the tonneau, the car moved
around the grounds giving radio con-
certs at different points, and never
= failing to draw a crowd. E. H. Muir
. ray of Racine, Wis, is the operator
The car passed through Richmond
| Sunday night, giving a radio concert
on South E street, and going on to
the Indiana fair, from which the oper-
| ator intends to return to the fair at
, Richmond.
, Radio Land Sales
{ The use of radio by real estate deal
ers in land auctions has been started
by the installation of a set ou Long
: Island, where 1900 lots were solo
within two days, by auction. No teIe.
: phone service was available, and the
/ radio was used to communicate with
5 the auctioneers, on the ground being
= sold. Without radio, messenger boy
: service would have been the only
method of communication.
Nauen Improvement
2 The sum of S6,000,000 is being spent
S at Nauen in improving the station
4 Seven new masts are being erected
$50 feet high. Two systems of an.
tenna stretching in different directions
will be changed so that they can be
combined. Increased traffic with South
and North America will be possible
: Transmitting apparatus is to be added
} to. Morse and Siemens automatic
printers are used, working at rate o.
$50 words minute.
Radio Shows
On account of the epidemics of radio
shows last winter and spring, AMI the
i consequent heavy demands on manu-
+ facturers who did not want to he left
4 out of any, the largest makers Of
radio have agreed to patronize only
\, two large shows a year, one in the
l. spring at New York and one i'll the
o fail at Chicago. While many othel
V cities, as Detroit, Cincinnati AMI Pitts
e burg, lay claim to being radio ceIters
k any shows put on there will have t
r be maintained by dealers or snalle
manufacturers.
This restriction has been made nee
: essary by the show promoters" WHIT
get up shows as money making
e schemes, charging exhibitors for space
l. The new plan is similar to the prac
tise of the automobile industry, which
i suffered from the same condition wher
r it was young.
Radio at Dublin Fair
K A radio receiving set, installed b,
l. Rowe and Mcguire at the Dublin fai
S last week, proved one of the Invest at
It traction on the grounds, and the oper
Il ators were kept busy all day entertain
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