CONQUEST OF DISTAXCE BY WIRE TELEPHONY 411 



Disturbances (Noise and Electrolysis). 



1. A test at Derry, Pennsylvania, on the Scott compensator for reducing 

 disturbances on telephone lines exposed to alternating current rail- 

 way induction. 



2. Test at East Pittsburg, Pennsylvania, of the Scott compensator for 

 reducing disturbances on telephone lines exposed to alternating rail- 

 way induction. 



3. An investigation of the induction caused by alternating current rail- 

 ways along the lines of the Indiana and Cincinnati Traction Com- 

 pany. 



4. A study of the Providence, Warren and Bristol trunks and prepara- 

 tion of the proper treatment of these lines to reduce excessive noise 

 troubles. 



*5. A study of the induction and electrolysis troubles likely to result from 

 the alternating current electrification of the New York, New Haven 

 and Hartford Railroad. 



*6. A study of alternating current electrolysis. 



*7. A study of battery crosstalk under var}ung conditions. 



Insulation. 



1. A study of enamel wire insulation in connection with various forms 

 of apparatus. 



2. A study of enamel insulated wire submarine cables. 



*3. A study of the insulation afforded b}' different types of aerial wire 

 insulators under different weather conditions. 



Loading. 



*1. The development of equipment for new loading coil testing room 

 at the Western Electric Company's factory in New York. 



2. A study of the loading of the Boston, Salem and Beverly low ca- 

 pacity cable. 



3. A study of extra light loading for terminal and trunk cables. 



4. A study of the loaded cables used for inter-office trunks in Kansas 

 City. 



*5. A general study of load coil efiiiciencies. 



6. A study for a loaded cable between Albany and Schenectady. 



7. A study for a loaded cable between Jordan City and Salt Lake City. 



8. A study of loading for inter-office trunk cables in Chicago. 



9. A study for loaded toll cables in Kansas City. 



10. A study for loaded toll and trunk cables between Brockton, Taun- 

 ton and Middleboro. 



