NOV. 14,1912 

 54° F. 



',1912 

 •F. 



-^LAiD N0V.5,l9l2-» 

 O 10 ' 20 30 



I PLAIN CEMENT 

 GRAVEL AGGREGATE 



MAY 20 , 1913 

 65*- SO" F. 



INITIAL READING; 

 TAKEN 



26,l9l2-»»j U— APRIL 23' l3-4-«- APRIL 22» 

 30O 310 320 330 340 350 360 .370. 

 OIL CEMENT J OIL CEMENT 

 TE I LIMESTONE AGS. \ TRAP ASS. 



Fig. 13i 

 80045°— 17— Bull. 53 



Md. Laid in 1912 and 1913. 



