MEAN ANNUAL SPECIFIC GRAY 
AnlJkrrilr Ctr^Xn 
LINES SHOWING THE 
MEAN ANN1".\I. SPECIFIC GRAVITY fs^^) 
OK THE STTIFACE OK THE OC'EAN 
Kotr * fir/mllrii iu/tr<l tliiu f65*'l 0265 Ac. . 
a!’ li\is “(lijllruger' 
Trar^ of ILM-S. 
