Popnlar Science Monthly 



87} 



Attaching the Phonograph to 



the Telephone — the Latest 



Efficiency Device 



A MISTAKE in that order? 

 Was it taken over the tele- 

 phone? And was there a dicta- 

 phone record of it? If so the 

 error is not Hkely to be chargeable 

 to the office, for there in the com- 

 plainant's own voice is the record 

 of what he said over the tele- 

 phone. That's the newest idea. 



All this is realized by means of 

 an invention patented by Green- 

 how Johnston, of Richmond, Va., 

 which transfers conver- 

 sations from the tele- 

 phone to the phonograph. 



The transference of 

 the sound waves is made 

 through a small box 

 which contains a num- 

 ber of reeds inside. 

 This box is the keystone 

 in the invention, for it 

 amplifies the telephone 

 sounds so that they will 

 make an intelligible record on the phono- 

 graph. The ordinary sounds from the 

 telephone receiver are too weak and too 

 befogged to produce a clear record when 

 led to the phonograph directly. But 

 when these same sounds are led first 

 through the box, the reeds take up their 

 vibrations and add strength to their 

 tone. The receiver and the transmitter are 

 both connected with the amplifying box by 

 tubes. The phonograph 

 is also connected with 

 the box by a tube. 



SoutxJ intensifier 



Sound pipe 



Transferring conver- 

 sation from the tele- 

 phone to the phonograph 



At left: How the tele- 

 phone sounds are ampli- 

 fied to make a record 



The device can take 



the conversation of 



either or both persons 



talking, or, if not 



needed, it can be easily disconnected fron 



the telephone. Connection can be made 



with any telephone or phonograph. 



Army officers watching the maneuvers of the wooden tank 

 The wire-cutting blade over the front wheel is an innovation 



A Wooden Tank Shows Itself Off 

 Before Army Officers in California 



AN armored tractor car of the tanl 

 . variety which disclaims any relation 

 ship to the members of the original family 

 which ambled across No Man's Land, took 

 California by surprise recently. Although 

 it was constructed of light lumber with 

 wooden rivets it was formidable enough 

 in appearance to furnish the thrill for ii 

 motion-picture battle. 



After it had served the purpose of 

 the motion-picture people a demonstra- 

 tion test was held before a board of 

 the United States army 

 officers at Los Angeles. The 

 pseudo tank climbed hills and 

 worked its way ov^er sand 

 dunes to the edification of the 

 army men. The formidable- 

 looking gun which peeps out 

 of the front turret is of wood 

 and is as harmless as a pea- 

 shooter. One noteworthy in- 

 novation is the wire cutting 

 blade carried in front directly 

 over the wheel. 



