Tables 41-44. * 73 



COMPRESSIBILITY, HARDNESS, CONTRACTION OF ELEMENTS. 



TABLB 41. — Compressibility of the More Important Solid Elements. 



Arranged in order of the increasing atomic weigiits. Tiie numbers give tlie mean elastic change 

 of volume for one megabar (0.987 atm.) between 100 and 500 megabars, multiplied by 10''. 



StuU, Zeitschr. Phys Chem 6i, 1907. 

 TABLE 42.— Hardness. 



From Landolt-Bornstein-Meyerhoffer Tables : Auerbachs, Winklemann, Handb. der Phys. i? 

 TABLE 43. — Relative Hardness 0! the Elements, 



Rydberg, Zeitschr. Phys Chem 33, igcxj 



TABLE 44. — Ratio, p, ol Transverse Contraction to Longitudinal Extension under Tensile Stress. 



(Poissnn's Ratio.) 



