LISTS 



Circular 



254. Fish-passage research. Review of Prog- 

 ress, 1961-66. By Parker S. Trefethen. Oc- 

 tober 1968, 23 pp., 37 figs. 



ABSTRACT 

 Results of accelerated laboratory and field exper- 

 iments to investigate problems of anadromous fish 

 passage at high dams are summarized. Studies 

 were made on: the passage of adult and juvenile 

 fish through large, medium, and small impound- 

 ments; design and operation of adult fish-passage 

 facilities at dams; mortalities of juvenile fish pas- 

 sing through turbines and methods of reducing 

 losses; collection of juvenile fish from rivers, 

 streams, and reservoirs; transportation of juvenile 

 fish; and the effect of the changing environment 

 on passage and survival. Publications by the staff 

 are listed. 



255. Published in 1967. 



256. Design of the fishery research vessel 

 Oregon II. By Francis J. Captiva. April 

 1968, 27 pp., 10 figs., 21 apps. figs., 2 apps. 

 tables. 



ABSTRACT 

 This paper describes the United States Fish and 

 Wildlife Service, Bureau of Commercial Fisheries 

 research vessel Oregon II. The vessel has been de- 

 signed for exploratory fishing and gear development 

 studies in the tropical and subtropical portions of 

 the western Atlantic, Gulf of Mexico, and Caribbean 

 Sea. It will be 170 feet long, will have a mean draft 

 of 12 '/j feet, and a beam of 34 feet. Two 800-horse- 

 power engines will propel it through a single pro- 

 peller. The vessel incorporates many innovations 

 for ease, safety, and flexibility in gear handling. 



257. Published in 1967. 



258. Monthly mean charts sea surface temper- 

 ature north Pacific Ocean 1949-62. By L. E. 

 Eber, J. F. T. Saur, and 0. E. Sette. June 

 1968, vi + 168 pp. of charts. 



ABSTRACT 

 This atlas contains 168 monthly sea surface tem- 

 perature charts for the Pacific Ocean north of lat 

 20° S. The series extends from January 1949 

 through December 1962. Each monthly chart con- 

 tains isotherms for intervals of 1° C and plotted 

 values representing the density of observations by 

 grid "squares" (about 86 nautical miles to a side). 

 The data were taken from the marine weather 

 observations stored in Punched Card Deck 116 at 

 the National Weather Records Center, Asheville, 

 N.C. The amount of data available per chart ranged 



from about 5,000 observations at the start of the 

 series to 15,000 at the end. The observations were 

 distributed more abundantly along trade routes and 

 were generally sparse in tropical regions. 



Editing procedures exercised for quality control 

 included rejection of erroneous values and the ap- 

 plication of corrections to temperature values re- 

 ported by ships which were determined to be syste- 

 matically biased, relative to other ships. A nu- 

 merical analysis technique, based on Carstensen's 

 Relaxation Method, was used to obtain digital rep- 

 resentation of the temperature fields. The isotherms 

 were smoothed to reduce small-scale irregularities. 



259-266. Published in 1967. 



267. Progress in exploratory fishing and gear 

 research in Region 2 Fiscal year 1967. By 

 John R. Thompson. September 1968, 14 pp., 

 13 figs. 



ABSTRACT 

 Accomplishments of the Bureau of Commercial 

 Fisheries Exploratory Fishing and Gear Research 

 Base in Pascagoula, Miss., and its Station in St. 

 Simmons Island, Ga., are documented for fiscal year 

 1967 (July 1, 1966-June 30, 1967). Area covered 

 in the explorations is the tropical and subtropical 

 western North Atlantic, including the Gulf of Mex- 

 ico and Caribbean Sea. 



268. Published in 1967. 



269. Organizing the technical article. By F. 

 Bruce Sanford. March 1968, 41 pp., 36 figs., 

 1 app. 



ABSTRACT 



No article can be more efficient than the outline 

 from which it is written. This manual presents a 

 technique for devising an efficient outline by either 

 deductive or inductive reasoning, whichever is more 

 appropriate to the circumstances. The technique is 

 based on strict adherence to the principles of logic. 



270-282. Published in 1967. 



283. Heading-introduction technique. By F. 

 Bruce Sanford. February 1968, 32 pp., 49 

 figs., 1 table. 



ABSTRACT 

 Because of the vast increase in the scientific lit- 

 erature, technical writers must help the reader 

 grasp ideas quickly. For this purpose, headings 

 and introductions are two of the most useful devices. 

 Headings give the reader immediate insight into 

 large blocks of information and help him digest them 

 rapidly. Accordingly, they are an exceedingly val- 

 uable aid to speed reading. 



Although headings are greatly helpful, they are 

 not sufficient. They sometimes are ambiguous, they 

 do not give reasons, and they look neither backward 



