﻿PHYSICAL TESTS OF KOAD-BUILDING ROCK. 47 



Table 2. — Results of compression tests of rock, made jfrior to Jan. 1, 1916 — Continued. 



ILLINOIS— Continued. 



Serial 

 No. 



Locality. 



County. 



Name. 



Crushing 



strength , 



pounds per 



squareinch. 



7301 









19, 700 



7302 



.do... 



do 





17, 050 



7871 





....do 





16,700 



4421 









15,100 



7422 





Ode 





18,640 



7423 



do 





do 



18, 180 



5549 









19, 510 













INDIANA. 



5534 









20, 350 



4655 





Decatur 



do 





17,960 



4658 



St. Paul . 





18,400 



4690 





do 





20,000 



4659 



St. Paul.. . 



do 



do 



20, 510 



5088 



.do.. 



do 





19,800 



4197 



Mitchell . . 







12,250 



5027 





do 





6,900 



5029 



do . 



do 



do 



6,450 



3368 







do 



16,000 



5737 







do 



14, 470 



4657 









18,790 













IOWA. 



Cedar Rapids . 

 La Grande 



Linn 



Marshall . 



Dolomite limestone . 

 do 



19,950 

 14,850 



KENTUCKY. 



5552 





Caldwell 





23,860 



7688 



Cedar Bluff 



do 





25, 720 



5921 









14,900 



5922 





do 





13,400 













MAINE. 



7438 









18,400 



8745 



Vinal Haven 







20,020 



8768 



do 



do 



22,800 



8769' 





do 



do 



20,930 



8781 





do 



do 



18, 780 



9865 





do 



do 



17, 150 



9996 





do 



do 



17,540 



9445 





do 





21,220 



10366 





do 



do 



27,050 



7439 





Waldo 



do 



20,600 













MARYLAND. 



Mount Savage Junc- 

 tion. 



Frederick 



Havre de Grace 



do 



do 



do 



do 



do 



Alleghany Siliceous limestone 



Frederick. 

 Harford . . . 



do 



do 



do 



do 



do 



Limestone 



Gneissoid granite. 



Sericite gneiss 



Gneissoid granite. 



Amphibolite 



Gneissoid granite. 

 do 



34, 930 



17,580 

 34,410 

 20,090 

 21,670 

 34,380 

 35, 210 

 22,190 



