SCIENCE IN THE INDUSTRIAL WORLD 



CHAPTER III 



WIRELESS TELEGRAPHY 



(pp. 62, 63). Marconi on the tuning of wireless messages. The 

 quotation is from an article by Marconi in the Century Magazine 

 for March, 1902. 



CHAPTER IV 



THE DEVELOPMENT OF THE TELEPHONE 



(p. 68). Dr. Robert Hooke's account of his telephone was 

 communicated to the Royal Society in 1667. 



(pp. 73, 74). Lord Kelvin's account of Elisha Gray's electric 

 telegraph and Dr. Graham Bell's telephone is quoted from the 

 Report of the British Association /or the Advancement of Science 

 for 1876. 



(p. 74 seq). Dr. Graham Bell's account of his invention of the 

 telephone is taken from a lecture on "Researches in Electric 

 Telephony" given by Dr. Bell before the Society of Telegraph 

 Engineers, October 31, 1877. 



(p. 91). Wireless Telephony. The quotation is from an article 

 entitled "The Latest Conquest of Space," by Beatrice Cassell, 

 in Harper's Weekly for July 17, 1909. 



Somewhat more technical accounts of various apparatuses con- 

 nected with telegraphy and telephony will be found in the Key 

 and Index Volume in the section devoted to Mechanical Instru- 

 ments and Appliances. 



CHAPTER V 



THE EDISON PHONOGRAPH 



(pp. 97, 98). Mr. Edison's description of the phonograph is 

 quoted from The North American Review for May-June, 1878. 



For a somewhat more technical description of the phonograph 

 and also for a description of the magnetic phonograph, known 

 as the telegraphone, see the Key and Index Volume. 



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