vi PREFACE 



end of 1945, and most of the work was completed during the summer of 

 1946 at Woods Hole. 



The writer is greatly indebted to Columbus O'D. Iselin, director of 

 the Oceanographic Institution, and Paul M. Fye, then director of the 

 Underwater Explosives Research Laboratory, for their generous and 

 unfailing cooperation in making the facilities at Woods Hole available. 

 The help of many others should also be acknowledged, both in helpful 

 discussion and advice and in the preparation of the manuscript. The 

 list of all these is too long to be given here, as it should for one reason 

 or another include virtually the entire personnel of the Underwater 

 Explosives Research Laboratory during its existence. The wTiter can 

 only hope that they will find the accounts given here of some of their 

 work a partial recompense. 



A final debt is to my wife Elisabeth for her unfailing help and en- 

 couragement, particularly in the more tedious parts of the enterprise. 



Robert H. Cole 

 Brown University 



