INSTITUTION ARCHIVES 



W.H.O.I. DATA LIBRARY 



WOODS HOLE. MA. 02343[ 



HYDROGRAPHICAL SURVEYING 



A DESCRIPTION OF MEANS AND METHODS 



EMPLOYED IN CONSTRUCTING 



MARINE CHARTS 



By the late REAR-ADMIEAL 

 SIK WILLIAM J. L. WHARTON, K.C.B. 



lATE HYni;Of;nAI'HER TO THE AIi.MIKALTY 



FOURTH EDITION, REVISED AND ENLARGED, 



DY 



ADMIRAL SIR MOSTYN FIELD, K.C.B., F.R.S. 



SOMKTIME U^DROGRAPHER TO THE ADMIRALTY 



WITH DIAGRAMS AND ILLUSTRATIONS 



LONDON 

 JOHN MURRAY, ALBEMARLE STREET 



1920 



