18 



LINEAR EXPANSION TABLES. 



IV. Sulphates, Carbonates, and Phosphates. 



V. Silicates. 



Name. 



Beryl. 



« Emerald. 



Coeff. of Expansion. 



Authority. 



.OOOOOI7214. Longit. axis. I ° Q 



[ 2 \ Pfaff. 37. 

 — .OOOOOOI316. Horiz. « 

 .OOOOOI06. Following axis. 

 .OOOOOI37. Normal to « 



Jo 



Fizeau. 49. 



