THE FLOW OF WATER IN WOOD-STAVE PIPE. 
19 
■Open to air. 
2"?6"Wi.P/pe 
f '/8ho/e 
CJ.P/D^,brojed. 
?F/'bre washer. 
-5crew cap 
Wo//bo/e 
fCScobe 
FlG. 3.— Method of attaching mercury manometers to wood-stave pipes. Details of manometers, fluores- 
cein gun, and combined current meter weight and mercury bottle. 
