RESULTS OF PHYSICAL TESTS OF ROCK, 1916 AXD 1917. 
23 
y t- n x d 
f^^/r 
NOCOC 
t- O 
rcMX/ 
X >■ 
M ri cc i - 
x 00 d ed 
7) r 
ad w 
bo r. o> •* c* o 
■» ■* K N n ri 
~ lt — .- CO 
t- l~ — (C >C 
SiSSsI 
