Page:Popular Science Monthly Volume 88.djvu/591

 Popular Science Monthly

��Telegraphing with the Telephone

THE man at the telephone is tele- graphing. He is Paul P. Banholzer of Philadelphia, connected with the steam engineer-

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and

��ing and electrical department of the Navy. He has increased the effi- ciency of the tele- phone by devis- ing a telegraph- transmitter which can be attached to any telephone standard. The connection be- tween the two in- struments is pure- ly mechanical and not electrical. The device does not require an ad- ditional electric circuit. Its ad- vantage lies chief- ly in the fact that the Morse signals sent by this in- strument carry farther over a long distance tel- ephone line than the voice and that the sounds pro- duced are definite and unmistaka- ble even to an inexperienced person. The instrument is especially useful in telephone train-dispatching. If the tele- phone conversation is not clearly under- stood it can be verified, or supplemented by the telephone-telegraph instrument.

��The doctor did not care to carry a medicine

��case, so he filled a hollow cane with pills instead

��The telegraph-key is mounted very much like any other telegraph-key, except that it is pivoted at its extreme end; the sound that it produces is sharper than ihat of the ordinary telegraph-key and is conducted to the telephone through the metal base and through clamps which

���encircle the telephone standard fasten the instrument in place.

The apparatus is being tested out at the Philadelphia Navy Yard with wireless.

It is claimed that

i f conversation can be trans- mitted by wire- less telephoning, telegraphing by wireless telephone with this instru- ment, can be con- ducted by any "wire" operator, and that it will be possible to intro- duce wireless on all railroads. When telegraph wires are down, this device can be used on the tele- phone circuit in conduits under- ground.

��A telegraph-key attached to a telephone,

which places the whole vast telephone

system of the country at the disposal of

the telegrapher

��Cane Holds Doc- tor's Medicines

���AN l\ p]

��eccentric hysician, who did not like to be seen carry- ing a medicine- case, devised a hollow hard- rubber walking- stick with a sliding metal holder for the bottles of tablets and powders and other first-aids. This metal holder is a half-tube, slightly crimped at the edges, so as to grip the bottles tightly enough to prevent them from falling out when the tube is pulled out of the

���cane. To all appearances the cane is just like other walking-sticks, but when the old physician removes the handle, by unscrewing it from the straight part of the cane, a sort of button is revealed, which serves as a means of grasping and pulling out the tube with its drugs.

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