PREFACE 
The editor was very honoured and delighted to receive the invita- 
tion of the Office of Naval Research to edit the collected edition of Sir 
Thomas Havelock’s hydrodynamical papers. Since his first introduction 
to hydrodynamical research many years ago, the editor has always re- 
garded Professor Havelock’s work with the greatest admiration and re- 
spect. And, for nearly forty years, after making personal acquaintance 
with Professor Havelock, the editor has received much very kind advice 
and assistance from him, which he is very glad to acknowledge here. 
Nearly all the mathematical analysis in these papers has been re- 
worked, and a number of minor misprints have been found. In one or two 
papers more serious changes have been made, either by Professor Have- 
lock himself, or with his agreement. The papers are arranged in chrono- 
logical order, without reference to their content. The subject receiving 
the most attention in the papers is the development of the mathematical 
theory of wave resistance and wave formation for a moving body. The 
papers in the following list deal with this and show the development of 
the theory from elementary methods to a complete solution for any body, 
subject only to the assumption of small wave height, that is, of a lin- 
earised potential. 
Paper Nos. Pages in this Collection 
lto 4 lto 80 
6 94 to 104 
7&8 105 to 131 
10 146 to 157 
15 to 27 192 to 329 
29 to 36 347 to 428 
44 500 to 511 
46 to 52 520 to 582 
509 615 to 616 
Paper No. 20 (pages 249 to 264), Paper No. 32 (pages 377 to 389), 
and paper 51 (pages 563 to 574) give a summary of the practical results 
to be deduced from the theory at their respective dates 1925, 1934, and 
1951). 
All but five of the remaining papers deal with various motions of a 
ship by similar methods, i.e., with rolling, pitch and heave, motion in 
a seaway, etc., and their individual subjects are sufficiently specified 
in their titles in the List of Contents. 
