146 



Table 128. 

 VELOCITY OF SOUND IN SOLIDS. 



ThfVelocity of sounds in solids varies as ^E/ p, where E is Young's Modulus of elasticity and p the 



(insity. These constants for most of the materials given in this table vary through a somewhat 



ride range, and hence the numbers can only be .taken as rough approximations to the velodty 



which may be obtained in any particular case. When temperatures are not marked, between io° 



and 20° is to be understood. 



