Wave Analyzer - After trips to NRL and NACA to view current 

 spectral analyzers, two papers were submitted to the Board for review. 

 The first paper discussed the design of the optimum filters. The second 

 paper discussed the overall design of the analyzer which is based on a 

 heteroctyne principle which will eliminate many of the difficulties of 

 current analyzer designs. 



Conferences with the Board staff cleared up some of the features of 

 the analyzer and plans were made to proceed with its construction. The 

 component parts have been ordered, and work has begun. 



IV, The Agrici4tural and Mechanical College of Texas, Quarterly 

 Report for Period ending 31 March 1953. 



The progress made during the first three quarters of this contract 

 period has been summarized in the Quarterly Report for the period ending 

 December 31, 1952 and dated January l5, 1953. 



During this quarter of the contract period, the following progress 

 was made. 



1. Field Operations , No additional wave data was obtained during 

 the fourth quarter. This was due to a temporary abandonment of the 

 Pure Oil site and the f acilities available there. During the last week 

 of January, when the driller was bringing in a fifth well on the Pure 

 Oil Structure A in Block 32, a fire broke out and completely destroyed 

 the drilling platform. All Research Foundation instruments had to be 

 removed from the instrument shack located on the Quarters platform. 

 This included two of the wave recorders and pressiu'e heads furnished 



the Research Foundation by the Beach Erosion Board, One of the units was 

 installed permanently at this site. The other set was housed temporarily 

 in the instrument shack, awaiting for a suitable time and opportunity to 

 install at Pure Oil B Structure located 1]4,500 feet SW of A Structure. 



In the process of moving the instnimaits from the instrument shack 

 only minor damage resulted, most of which has already been repaired. 

 In addition 75 feet of two conductor cable and a case for one recorder 

 became lost or misplaced in the shuffle. It is hoped, however, that the 

 above items may still be recovered, 



2. Wave Data . The analysis of the wave records taken last summer 

 has been completed. Of the data, only ten runs had waves of large 

 enough magnitude to analyze reliably. The friction factors associated 

 with the above runs have been calculated and vary between ,032 to .15, 

 with a mean at ,070 and median at ,06U. 



Very little data has been accumulated on the generation of shallow 

 water wind waves during the winter months. This, of course, is due to 

 the temporary, forced abandonment of the Pure Oil Site, 



3. Theoretical Investigation , A theoretical investigation on the 

 "Change in Wave Height Due to Bottom Friction, Percolation, and Refraction" 



-15- 



