22 



o 

 Monthly and Annual Mean Surface tVater Ten^eratures, F 



April 1873 - February 1875, Grand Trunk Railroad VJharf; March 1887 - February 1879, 

 Casco Bay, foot of Grand Trunk Wharf; March 1879 - October 1888, Foot of Custom House 

 Wharf, Portland Harbor. 



Readings once per day 

 Source - USCFF 



