5 PREFACE 
both by Dr. Roy S. MacElwee, of Charleston, South 
Carolina, U.S.A., published by the McGraw-Hill Book 
Company Inc., of New York, and obtainable in this country 
at the offices of the McGraw-Hill Publishing Co., Ltd., 
6 Bouverie Street, Fleet Street, E.C.; also to Wharf 
Management, Stevedoring and Storage by MacElwee and 
Taylor, published by D. Appleton and Company, New 
York and London. 
Finally, the author desires to express his grateful acknow- 
ledgments to several friends who have kindly supplied data 
and made suggestions, and, in particular, for permission 
to use the photographs and plans. 
BROAD SANCTUARY CHAMBERS, 
WESTMINSTER, S.W.1. 
January, 1920. 
71