INDEX TO THE FIGURES 
Frontispiece. A Photograph of a Short Crested Sea 
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Surface. Photograph through the courtesy of 
Prof. Robert S. Arthur. Scripps Institution 
of Oceanography. 
1. Graphs of the Continuous Spectra of Finite 
Wave Groups for Various Values of 9 andT..... . 
2. Form of the Graph of the Argument of S(7).... 
3. Form of the Finite Wave Group as a Function of 
Time When it Passes Various Points. 
Ga 1/204 eT (=O eee cos cS USM Cen deter oer 
4. Form of the Finite Wave Group as a Function of 
Time When it Passes Various Points. 
oS 3/20) es B00) 
5. Envelope of the Finite Wave Group as a Function 
Oh foririxed) Times. ll) l=) 1/100) sec—) Tf = 10sec: 
6. Graphs of b(#) for Various Values of n. Co- 
ordinate Scales Differ for Different n for bottom 
graph as shown SMMC et ne Ne. leit tor et tel Wer ton cemhrai. Teme 
7. G* and H* Graphed as a Function of 
(g/4rx,) 2+! @. “Weretes eur et Me: ie) @. ‘el. oe. (iene)! Jet 8) ete ken (eo iKe 
8. Graphs of the Finite Wave Train as a Function 
of t' for Various Values of x}. T=10 sec n= 1800 
9. Variation of the Envelope, the Average Potential 
Energy, and the Phase of the Crests for Relatively 
Large Values of X, as a Iohawalerey Cit Ww! loeG dso O86 ovo 
10. Graphs of Segments of Equations (6.4) (6.5) and 
11. Dispersion Curve for Model Wave System ..... 
12. Some Very Condensed Sample Wave Records ..... 
13. Graphs of the Functions Involved in the Various 
Examples of the Lebesgue Stieltjes Power Integral .. 
14. Histograms of Wave Height and Pressure Amplitude 
DistribucLons from Sample) Wave Records i.) vee Neutaienc 
= Sey 
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