Transactions Society Naval Architects and Marine Engineers, Vol. 24, 19106. Plate 58. 
To illustrate paper on “A Theory of Fluid Friction,” 
by William Gatewood, Esq., Member. 
FIG.3 
CHANGE IN DEPTH AT ROUGH LENGTH 
SAAS EEE AT ROUGH LENGTH 
OPEN TROUGH 
HEAD DECREASING AS PEPTH INCREASES 
Vien \ 
29° 4 y 
4 
g | 
y 
FRICTION 
4 
Excess 4 
j 
FIG.4 
CHANGE IN VEPTH AT ROUGH LENGTH 
=e . 
OPEN TROUGH 
HEAD INCREASING AS DEPTH INCREASES 
Wa Ge 
ee 
SURFACE 
SR 
j 
: 
