maximum xrave recorded each day to the average of the highest ten per 

 cent for that day was 1,46 and the ratio of the average of the 

 highest ten per cent to the average of the highest one-third of the 

 waves each day Viras 1.29 for any place along this section of the 

 Pacific Coast „ It was also found that the average period of the 

 swells (that is, excluding the local storm "chop") was 12 seconds » 



'*A Theory of tte Hydraulic Injector," Duilio Citrini (Saggio Di Teoria 

 Dell'Iniettore Idraulico), Memorie e Studi dell'Istituto di Idraulica 

 del Polite cni CO di Milano, No, 72, IQ^S 



The analysis of the motion in the mixing-room of a hydraulic 

 injector (jet pump) is developed, for incompressible fluids, without 

 using the hypotheses, usually but incorrectly admitted, of constant 

 pressure head and negligeable losses of head. The increase of the 

 pressure head along the device is evaluated. For the losses of head 

 an approximate analytical expression is given. 



The efficiencies of the device for different situations are ex- 

 amined and examples of practical calculation are given. 



The theory is developed for the injector with cylindrical mixing- 

 room, but successively the case of a convergent mixing-room is too 

 examinated, according to a type proposed by Rateauj the comparison 

 shoviTs that the cylindrical type furnishes in general a higher 

 efficiency. 



"Critical Comparison of Jfeasurerrents of the Vertical Distribution of '/and 

 On the Sea," Hans-Ulrieh Roll, (Vergleichende Betrachtung und Kritik von 

 Y^ndprofilmessungen auf See) Annales of Ifeteorology, ?.i!arch-April 1949. 



A comparison of the measurements of the vertical distribution of 

 wind in the lowest atmospheric layer above the sea-surface leads to 

 the following results: The profiles measured by Montgomery, Shoulejkin, 

 and Roll agree satisfactorily, disturbances of the field of wind speed 

 having been avoided as far as possible. The measurements of IVust, 

 Bruch and of the Altair voyage, however, show departures in the sense of 

 greater roughness parameters above the level of 50 - 100 cm. By a 

 discussion of the possible source of error and by comparative measure- 

 ments it was made probable that these differences are not due to 

 fundamental causes but to inaccuracies in the technique of m.easuring. 

 In particular it appeared that the measurem.ents of wind on tte bow 

 of an anchored ship may yield results that are 50 - 100 cm./s to high« 



"The Application of Conformal Transformations of Ocean ''jYave Refraction 

 Problems," New York University, Leon So Pocinki, April 1950. 



If the bottom contours are considered straight ?nd parallel, and 

 if the usual assumptions are made, a simple differential equation for 

 the orthogonals can be derived from Snell'3 Law. Solutions to the 

 equation are easily obtained. Conformal transformations may be applied 

 to change the contours in tte complex Z plane into several different 

 configurations in a complex ^.V plane. In each case an orthogonal in the 

 Z plane maps into a new orthogonal in the W plane and thus a solution 

 to the problem of wave refraction over the contour configuration in the 

 W plane is obtained. An expression for K,j is then derived from the 

 orthogonal pattern. Cases treated include a circular island, a reef 

 and a bay with parabolic contours, and twin islands, 



51 



