59 



o 

 Monthly and Annual Mean Surface Water Temperatures, F 



North River, Pier 13 & Ih, 



1873-Oct. 1879 inol., readings at 3 p.m. local time. 



Nov. 1879-June 1881 incl., " " 1 p.m. " " 



July 1881-Nov. 1881 incl., " " 2 p.m. " " 



Feb. 1892-Oct. 188A incl., " " 2:12 p.m." " 



Feb. 1885-1390, incl., " " 2 p.m. 75th meridian time. 



SoTorce - U3CFF 



