EXPLANATION OF OCEAN TEMPERATURE CHART Nc. 13. 



SANDY HOOK LIGHT-SHIP, NEW YOEK. 

 Observers ; James Cosgrovb, E. H. Pritchaed. 



Location of station. — This light-ship is anchored in 14 fathoms of water, off the entrance to New York Bay, 6 miles 

 east of Sandy Hook, N. J., the nearest land, and 8i miles south of Eockaway Beach, Long Island. It is distant about 

 70 miles northeasterly from Absecon light. The 15-fathom curve forms a bight extending in towards New York Bay 

 entrance, and reaching nearly to the light-ship, inside of which the depths decrease somewhat rapidly. The SO-fathom 

 curve is distant 16 miles ; the 100-fathom curve, 95 miles. 



aeograpMcal position.— TjaiituAe, 40° 26' (12") N. ; longitude, 73° 51' (42") W. 



Depth of water. — Fourteen fathoms. 



Range of temperature (March 1 to January 1).-Air, 50° (31°.5 to 81o.S) ; surface, 41°.5 (33° to 74°.5). 



The range of air temperature is greater than at any of the three preceding stations, but the maximum is two 

 degrees lower than at Five-Fathom Bank, about the same as at Winter Quarter Shoal, and two degrees higber than 

 at Absecon. The maximum surface temperature is slightly lower than at the preceding stations. 



Table showing the direction of the winds, by quadrants, for each month of the year, being the means of five years' observations. 



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