13 



(4) "On the Resistance of a Heavy Flexible Cable for Towing a Sur- 

 face Float behind a Ship," by J.G. Thews and L. Landweber, EMB Report 4l8, 

 March 1936. 



(5) "The Shape and Tension of a Light, Flexible Cable in a Uniform 

 Current," by L. Landweber and M.H. Protter, TMB Report 533, October 1944. 



PRNC- 8639- 11-17-47- 60 



