United States. National Advisory Committee for Aeronautics, United States. National Aeronautics and Space Administration · Washington : G.P.O. · leaf 195
d the pressure gradientin the tubes are practically proportional to the square of the air flow, for a given air density.This fact and the approximate agreement of observed skin friction with that found by otherinvestigators appear to indicate that there is turbulent flow in the short tubes of the…
Aeronautics
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
