232 



TABLE 250. 

 LINEAR EXPANSION OF THE ELEMENTS. 



In the heading of the columns / is the temperature or range of temperature ; C is the coefficient 

 of linear expansion ; A\ is the authority for C; Mis the mean coefficient of expansion between 

 o and 100 C. ; a and are the coefficients in the equation /t = / (i + of + |8/ 2 ) f where / is 

 the length at o C. and /the length at t C. j A 2 is the authority for o, , and M. 



1 Fizeau. 4 Henning. 8 Holborn-Day. 



2 Calvert, Johnson 5 Dittenberger. 9 Benoit. 



and Lowe. 6 Matthiessen. 10 Pisati and De 



3 Chatelier. 7 Andrews. Franchis. 



The above table has been partly compiled from the results published by Fizeau. "Comptes Rendus," vol 68 and 



Mattlnessen, "Proc. Roy. Soc.," vol. 15. 



The Holborn-Day and Day and Sosman data are for temperatures from 20 to 1000 C. The Dittenberger, o to 600 C. 

 SMITHSONIAN TABLES. 



11 Hagen. 



12 Spring. 



13 Day and Sos- 



man. 



