630 



FRANK D. ADAMS AND J. AUSTEN BANCROFT 



in the thicker- walled tube, as 51,708 is to 60,415. Or, again, that 

 the "work done" in deforming a marble column, whether the resist- 

 ance be small or great, is almost exactly one-half of that required 

 to effect an equal amount of deformation in a column of granite 

 under the same conditions. That is to say, almost exactly twice 

 as much work is required to deform granite as is required to effect 

 an equal deformation in the case of marble and nearly four times 

 as much as is required to produce an equal deformation in the case 

 of steatite. 



TABLE III 



Relative Amount of "Work Done" in Effecting an 



Equal Deformation in Unit Columns of 



Different Rocks 



TABLE IV 



Relative Amount of "Work Done" in Effecting an 

 Equal Deformation in Unit Columns of Differ- 

 ent Rocks Calculated on the Basis of Marble 

 as Unity 



If the "work done" to deform marble be taken as unity, these 

 figures may be set forth as in Table IV. 



