348 



THE BELL SYSTEM TECHNICAL JOURNAL, MAR:H 1952 



5 2600 



200 



5 10 15 20 25 30 35 40 45 50 



TEMPERATURE IN DEGREES CENTIGRADE 



Fig. 24— Temi)erature variation of rigidity of 1 per cent solution of polj-iso- 

 butylene (Af, = 3.87 X 10'') in cyclohe.xane and benzene. 



16 20 24 28 32 36 40 



TEMPERATURE IN DEGREES CENTIGRADE 



Fig. 25 — Temperature variation of r/ij for 1 per cent solution of polyisobut ylene 

 (M, = 3.87 X 10'') in cyclohexane and l)enzene. 



