222 



Table 219. 

 COEFFICIENTS OF THERMAL EXPANSION. 



Coefficients of Linear Expansion of the Cliemloal Elements. 



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

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

 o° and 100° C. ; o and 3 are the coefficients in the equation /e = /o (i + o/ + /S/-), where /q is 

 the length at o° C. and /jthe length at /* C. ; Ai is the authority for a, yS, and m. 



7 Andrews. 



8 Holborn-Day. 



9 Benoit. 



1 Fizeau. 4 Henning. 



2 Calvert, Johnson 5 Dittenberger. 



and Lowe. 6 Matthiessen. 



3 Chatelier. 



"^"i*. ^"T"* '*^'.^< ^^ ^^^^ P^'^'y compiled from the results published by Fizeau, " Comptes Rendus," vol. 68, and 



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

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

 Smithsonian Tables. 



10 Pisati and De 



Franchis. 



11 Hagen. 



12 Spring. 



