BIGELOW: COAST WATER EXPLORATION OF 1913. 193 
at about the forty-five fathom curve off Cape May, and at about the 
eighteen fathom curve off Chesapeake Bay; and 33.5%po water at the 
forty, thirty, and ten fathom contours at the same localities. Bottom 
water fresher than 33% o was restricted to a narrow coastal zone north 
of Delaware Bay; and the curves for this value and for 33.5%po show 
evidence of water from the Bay, by swinging seaward off its mouth. 
But the outflow from Chesapeake Bay has no apparent effect on the 
curves, although it probably does reduce the bottom below what 
_ would otherwise obtain. The chart (Fig. 36) represents July condi- 
tions only; earlier as well as later in the season, the bottom water — 
was much salter at the few localities where water-samples were taken 
(34.18% off Cape May, May 9; 35.17%p in 60 fathoms, southwest 
of Nantucket August 22). 
Salinity profiles. A profile (Fig. 37) running from the southern 
edge of the basin of the Gulf of Maine (Station 10058) across Nan- 
ile 
| Fie. 37.— Salinity profile fr pee ae uthern part of the pas hey Su of 
. Mai aine (Station 10058) across Na mak cket Shoals to the r edge of the 
continental shelf south ee ntucket (Station 10061). 
