Tables 78-81 . jOi 



TABLE 78. — Interior rriction at Low Temperatures. 

 C is the damping coefficient for infinitely small oscillations; T, the period of oscillation in sec- 

 onds; N, the second modulus of elasticity". Guye and Schapper, C. R. 150, p. 963, 1910. 



From Landolt-Bornsteia-Meyerhoffer Tables : Auerbachs, Winklemanii. Handb. der Phys. 1891. 

 TABLE SO. — Relative Hardness of the Elements. 



Rydberg, Zeitschr. Phys Chem 33, 1900 



TABLE 81. — Ratio, p, of Transverse Contraction to Longitudinal Extension under Tensile Stress. 



(Poisson's Ratio.> 



From data from Physikalisch-Technischen Reichsanstalt, 1907. 

 p for: marbles, 0.27 ; granites, 0.24 ; basic-intrusives, 0.26 ; glass, 0.23. Adams-Coker, 1906. 

 Smithsonian Tables. 



