T^.ble 3 (cont'd) 



PORTIAND LIGHTSHIP 1;3°31.6'N, 700o5.5'^aJ. 



July 1956 



Depth of water - 150 feet 



Mean 



59.1 52.8 li7.3 li3.U (h2.0) 



30.65 31.38 



20 



