Bulletin 831, U. S. Dept. of Agriculture. 
PLATE XII 
Fig. I. — Model of Testing Siphon. 
Dotted line at foot of model shows approxi- 
mate shape of discharge lip of the models 
used in the Throop College experiments. 
Fig. 2. — Model with Gage Board 
and Several Piezometers At- 
tached. 
Connections for piezometer tubes were of f- 
inch brass tubing soldered flush to the inside 
face of the siphon. 
