8 
BULLETIN" 87, U. S. DEPARTMENT OF AGRICULTURE. 
also strengthens the flume itself. It is not believed, however, that 
the benefit to be derived from this form of construction is sufficient 
to compensate for the increased cost of construction and the greater 
Fig. 2.— End view of V-shaped flume, showing method of construction and double-lined box. 
amount of material necessary. The prospective constructor should 
be governed by the location, land of material available for con- 
struction, duration of life of flume desired, and material to be han- 
dled in deciding what type of construction he will adopt. 
