ICi 



REPORT — 1875. 



the open sea but ou au estuary, and one where the conditions of the channel 

 have been altered considerably during late years by engineering structures. 



Records of Tides in liiver Mersey at Liverpool, taken by the Self-recording 

 Tide-gauge at the George's Pier-head, Liverpool. 



Datum: Old Dock Sill (O. D. S.) at Liverpool. 



