'ABLE 221. 



COEFFICIENTS OF THERMAL EXPANSION. 



Coefficients of Linear Expansion of the Chemical Elements. 



In the heading of the columns T is the temperature or range of temperature, C the coefficient of linear expansion, 

 ! A l the authority for C, JJ/the mean coefficient of expansion between o and ico C., a and /3 the coefficients in the 

 ; equation / = / (i + at-^-ftt-), where /<, is the length at o C. and It the length at / C., A, is the authority for a, 

 ft, and in. 



N. B. The above table has been with a few exceptions compiled from the results published by Fizeau, " Comptes 

 Rendus," vol. 68, and Matthieson, " Proc. Roy. Soc.," vol. 15. 



SMITHSONIAN TABLES. 



2I 4 



