ABSTRACTS OF TECHNICAL PAPERS 211 



Joint Pole Use with Power Companies^ D. E. Lowell. The 

 relations between the telephone company and the other wire using 

 companies, especially the power companies operating in the same area, 

 are discussed in this paper. It recognizes the responsibility of the 

 telephone company as well as that of the power company for good 

 operating conditions in areas where both types of line are involved and 

 also points out the necessity of close cooperation between Connecting 

 and Bell Telephone Companies. The considerations involved in the 

 joint use of poles by telephone and power companies are given with 

 particular mention of the general joint use agreement. The importance 

 of mutual advance notice of plans is developed. The reports of the 

 Joint General Committee of the N. E. L. A. and Bell System form the 

 background of the talk and are recommended to those who have not 

 already read them. 



Adsorption of Gases by Graphitic Carbon. II — X-ray Investigation 

 of the Adsorbents.* H. H. Lowry and R. M. Bozorth. This paper 

 is supplementary to one by Lowry and Morgan appearing in the 

 Journal of Physical Chemistry in 1925 ^ and gives direct evidence that 

 the adsorbents studied were graphitic carbon. The X-ray data show 

 that carbon prepared by the explosion of graphitic acid is graphitic in 

 structure and that the individual particles are flakes averaging approxi- 

 mately 50 atom diameters in breadth and 10 atom layers in thickness. 

 The significance of this finding is discussed in relation to current views 

 of the nature of active carbon adsorbents. 



Recent Toll Cable Constructiofi ajid its Problems}^ H. S. Percival. 

 One of the outstanding developments in the Bell System has been the 

 rapid extension of toll cables. This has required the development of 

 new methods and apparatus. Material is carried into rough right of 

 way and installed through the use of tractors, with equipped trucks 

 and various types of automotive equipment. The development of 

 permalloy now allows the complete loading of a full-sized cable in two 

 pots where six were required before. Crossings over rivers are made in 

 submarine cable or by long span construction with catenary suspension. 

 Cables are tested before completion for sheath damage, defective 

 splices, etc., which might cause service failures, by means of dry gas 

 under pressure. 



^ Telephony, September 8, 1928, pp. 22-24. 

 * Journal of Physical Chemistry, October 1928, pp. 1524-1527. 

 9 Journal of Physical Chemistry, Vol. 29 (1925), p. 1105. 

 ^° Telephone Engineer, September 1928, pp. 31-33. 



