deviations from the laws describing the phenomenon in air. First 
appearances would indicate that the same laws hold in both media, 
With further development of the hot-wire technique, and possibly 
the dye-diffusion technique, it may be possible in the near future 
to confirm or amend the laws of turbulence as they apply to air 
to describe the situation in water. Aside from its use in investi- 
gation of fundamental properties of turbulence, the hot-wire has 
already shown that it will be a valuable tool for the investigation 
of boundary layers of ship models, a study which, as is becoming 
increasingly apparent, is necessary for improving prediction of full- 
scale performance. 
REFERENCES 
1, "Measurements of Intensity and Scale of Wind-Tunnel Turbulence 
and their Relation to the Critical Reynolds Number of Spheres," 
by H. L. Dryden, G. B. Schubauer, W. C. Mock, and H. K. Skramstad, 
NACA Tech Report 581, 1937. 
2, "The Development of Facilities and Photographic Methods of the 
Study of Turbulence in Water," by P. Hisenberg, M. S. Macovsky, and 
C. HE, Lemich, TMB CONF Report C-13, Sept. 1947. 
3. “On the Convection of Heat from Small Cylinders in a Stream 
of Fluid: Determination of the Convection Constants of Small 
Platinum Wires with Applications to Hot-Wire Anemometry," by L. V. 
Kine, Roy. soc). Lond... Phit Trans), Ve. cla. 1OlAs 
4. "Theory and Application of Hot-Wire Instruments in the Investi- 
gation of Turbulent Boundary Layers," by G. B. Schubauer, and P. S,. 
Klebanoff, NACA, ACR No. 5K27, March 1946. 
5. "Measurements of the Intensity and Scale of Turbulence," bv 
A. A. Hall, Aero. Res. Com., Rep, and Memo. No. 1842, August 1938. 
PRNC-8000-11-19-48-? 
