438 GENERAL SCIENCE 



Francisco a person in New York would not hear his friend speak in 

 San Francisco until four or five hours after he had spoken. The 

 time required for electrical currents to carry vibrations from New 

 York to San Francisco is one-fifteenth of a second. 



Visit the telephone central office in your town and have the workings of the 

 telephone explained to you. 



Read the " History of the Telephone " by Herbert N. Cason, published by 

 A. C. McClurg & Co., Chicago, 111. 



CORRECT TELEPHONE HABITS 



ON ALL OUTGOING CALLS 



Always look in the telephone book to make sure you call the right 

 number. If you do not find the number in the book, ask " Infor- 

 mation. " 



FIG. 335. The way you talk over the telephone often tells something about 



your character. 



Call this number with a slight pause between the hundreds and 

 the tens. For example, in calling " Barclay 1263," say, " Barclay 

 One Two (pause) Six Three. 



Speak clearly and distinctly, directly into the transmitter. 



Listen to the operator's repetition of the number and acknowl- 

 edge it. 



Hold the line until your party answers, and then give your 

 whole attention to the telephone conversation. 



