Popular Science Montlily 



187 



Combining the Telephone Receiver and 

 Transmitter in One Instrument 



A NOVEL method for combining the 

 receiver and transmitter of a telephone 

 into one instrument is the invention of an 

 enterprising woman, Rosa D. Hatch, of 

 Memphis, Tennessee. You speak and hear 

 out of the same device. The receiver is 

 mounted where the transmitter is generally- 

 placed on other telephones, while the trans- 

 mitter is secured directly in front of the 

 receiver. 



The receiver also differs from the ordinary 

 in that it contains a horn large enough to 

 throw the sound forward a distance of 

 about twelve inches. The transmitter is 

 directly in front of the receiver but with 

 its rear end towards it, so that there is little 

 chance of the speaker's voice repeating into 

 his own receiver. When starting a con- 

 versation, a button is pressed to connect 

 the instruments with the telephone lines; 

 and then, by talking and listening close up 

 to the hood which encloses the instruments, 

 the conversation may be carried on with 

 privacy. 



In this way the operation of the telephone 

 is made much more convenient, although 

 the essential construction of each instru- 

 ment has not been changed. A telephone 

 with such features ought 

 to find special favor 

 with business men. 



RECEIVER HORN 



IRIS SHUTTER 

 RECEIVER 



A 



The fire used to bum the garbage 

 also heats the surrounding water pipes 



A Water-Heating Garbage Burner Is 

 Both Useful and Sanitary 



GARBAGE burner which also sen'"es 



as a water-heater combines utility and 



sanitation. The garbage is placed in a 



chamber above the fire-box, the walls of 



which are the water pipes. This garbage 



burner is especially useful in the summer 



when fires must be kindled to heat water. 



The burner is provided with either a 



front damper-door or a base on which 



the damper-door is located at the side 



where the damper-chain is out of the 



way when the fuel is inserted. 



Holding the receiver to your ears is unnecessary in 

 this combination of telephone receiver and transmitter 



The Origin of the Locomotive Whistle 

 Is Associated with Butter and Eggs 



OX a level crossing between Bag- 

 worth and Thorton in England, 

 on May 4, 1833, there occurred an ac- 

 cident which gave us the locomotive 

 whistle. Stephenson's locomotive 

 "Samson" crashed into a cart con- 

 taining fifty pounds of butter and 

 eighty dozen eggs. Following the 

 accident a meeting of the directors 

 was called, at which Stephenson sug- 

 gested that a whistle blown by steam 

 be used to give warning of an ap- 

 proaching train. 



