Page:History of merchant shipping and ancient commerce (Volume 2).djvu/20

 THE LIVERPOOL BIRKENHEAD DOCKS.

Reference

Figures thus 28 show the depths in feet below a Low Water Level of 10f^t below O.D.S.   D^o      do   4 show the heights in feet above the same Level.

SCALE OF FEET

Published by Sampson Low, Marston, Low & Searle, Crown Buildings 188 Fleet Street, London     ''Engraved by Edw^d. Weller. Red Lion Square''