THE OREGON SPORTSMAN 295 
inch troughs somewhat modified to adapt them to the special work of 
the station. Each trough is divided into five compartments by wooden 
partitions perforated by twenty-five one-inch holes. Each ccmpart- 
ment has its own outlet at one end, protected by the usual perforated 
zine plate and furnished with a hollow wooden plug through which the 
overflow drains into a thin 2.5 inch galvanized iron pipe that pierces 
the floor and empties into a waste gutter below. As can be seen in 
the photograph, each compartment has its own inlet also, at the 
opposite end in the shape of a brass faucet, which receives water 
through short branches of galvanized iron pipe from a supply pipe 
for each group of troughs. The amount of water received by each 
supply pipe is controlled by a check valve not visible in the photo- 
graph, The initial diameter of the pipe is two inches, but is dimin- 
ished for the last two compartments to one inch in order to equalize 
the flow from all outlets along its course. By plugging the holes 
through the partitions between compartments, the latter can be com- 
pletely isolated from each other. Thus twenty-five small troughs, each 
large enough to hold a salmon eggbasket may be obtained for experi- 
ments with small numbers of fish that are being raised under different 
conditions. Eggbaskets, zincs, and eggs have been supplied from 
Bonneville through the kindness of Master Fish Warden Clanton. 
The laboratory is reached through the trough room, which it. just 
equals in size. It is lighted on the north, west and south by long 
casement windows. Immediately under these windows runs a table 
shelf two feet three inches wide. Shelves for reagents, apparatus, 
glassware and specimens occupy two corners between windows, while 
a hood furnished with two gas outlets and a ventilating shaft, oc- 
cupies a third. The room is heated by two small gas stoves fitted 
with chimneys to carry away all products of combustion. Each room 
is provided with a sink. 
The stream which supplies the hatchery with water arises in 
several springs some six hundred yards to the east. About one hun- 
dred yards from the building its waters are impounded by an earthen 
dam about fifteen feet high. From this point the larger part of 

Experiment Station—Interior Trough Room. 
the water is diverted to a ditch along the north side of the ravine. The 
floor of this ditch, where it passes the hatchery, is six feet above the 
level of the troughs which are supplied through a six-inch iron pipe 
with a screened intake and laid underground. The supply of water is 
ample the year round. 
