PREFACE 
The David W. Taylor Lectures were initiated as a living memorial to 
our founder, in recognition of his many contributions to the science of 
naval architecture and naval hydromechanics. His systematic investiga- 
tion of resistance of ship hulls is universally known and used, but of 
equal importance was his use of hydrodynamic theory to solve practical 
problems. Many of the experimental techniques which he pioneered are 
still in use today (for example, the use of a spherical pitot tube for 
exploring the structure of a wake field). The system of mathematical 
lines developed by Taylor was used to develop many designs for the Navy 
long before the computer was invented. And perhaps most important of 
all, he established a tradition of applied scientific research at the 
"Model Basin" which has been carefully nurtured through the decades, and 
which we treasure and protect today. 
These lectures were conceived to support and strengthen this 
tradition. We will invite eminent scientists in fields closely related 
to the Center's work to spend a few weeks with us, to consult with and 
advise our working staff, and to give lectures on subjects of current 
interest. 
It is most fitting that Professor Reinier Timman, mathematician and 
philosopher, initiate this series. He has long been a friend and on 
several occasions has used the Center for a retreat, to his benefit and 
ours. He has inspired and advised our staff and cooperated in our work. 
His students at Delft have made leading contributions to the development 
of modern naval hydrodynamics. Professor Timman's belief that mathe- 
matics can contribute powerfully to our technology is much in the David 
Taylor tradition. We are honored that he agreed to give the first in 
this David W. Taylor Lecture Series. 
W. E. CUMMINS 
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