CONTENTS 



Page 



Foreword iii 



Figur e s vi 



Tables vi 



I. Introduction 1 



II. Theoretical and Practical Aspects of Wave Height 

 Observations 1 



A. Techniques for Wave Height Observations 1 



B. The Theory of a Wave Record 4 



C. Visual Height Observations 9 



III. Visual "Period," "Wave Length," and "Speed" 

 Observations 31 



A. Definition of Terms 31 



B. Visual "Period" Observations 32 



C. Calculation of the Average "Period" in Terms of 

 Theoretical Spectra 32 



D. "Wave Lengths" 36 



E. Wave "Speeds" 43 



IV. Conclusions 44 



Bibliography 46 



Addendum 48 



