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 ; Ai is the authority for C; M \s the mean coefficient of expansion between 

 0° and 100° C. ; o and ^8 are the coefficients in the equation /(^/o (\ -\- at -\- i3/-), where /q is 

 the length at o° C. and /«the length at t° C. ; A2 is the authority for o, ^, a.x\dM. 



1 Fizeau. 4 Henning. 8 Holborn-Day. 1 1 Hagen. 



2 Calvert, Johnson 5 Dittenberger. 9 Benoit. 12 Spring. 



and Lowe. 6 Matthiessen. 10 Pisati and De 13 Day and Sos- 



3 Chatelier. 7 Andrews. Franchis. man. 



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



Mattliiesseti, "Proc. Rny. Snc," vol. !■;. 

 The Holborn-Day and Day and Sosman data are for temperatures from 20° to 1000° C. The Dittenberger, 0° to 600° C. 



Smithsoman Tables. 



