74 REPORT OF COMMISSIONER OF FISH AND FISHERIES. 
while they are yet in the hatching-troughs and before the absorption 
of the yolk sac, it has been found that they can be removed to the 
nursery ponds as soon as they begin to swim and that their physical 
condition isimproved. This food is placed in the aerating tray at the 
head of the trough, and soon finds its way to the fry at the bottom. 
A collection of 33,000 steelhead eggs was made from the four-year- 
old fish confined at the station and from a few captured in Bridger 
Creek. Of these, 12,000 were sent to the Pan-American Exposition 
at Buffalo; the rest were hatched at the station, and at the end of the 
year there were 6,600 fingerlings on hand. 
The following table shows the number of fish and eggs of all kinds 
on hand on June 30, 1901: 









Calendar year in which fish were 
Species. ee i 
1901. 1900. 1899. 1898. 1897. 
Brook trout) 22285 (ope c22- eens ck vector sea cee seek eee 202, 000 637 489 
Black-spotted trout---...--.- - |*293, 000 3, 691 119 
Steelheadttroutit-s2-2---2-- & 6, 600 149 2, 030 
Rainbowstroubsesesseses sees =aee eee ~aallzesae weca|Pacsasesth G00) | tel cee eee 
Graylin ees 22S. SiMe ose cen so eh Seat ee) AES Sa aee 29d; SSDI pees ooee pile le aeons 
Totale ca Sei cus BSS EL Rh oe ea ee RE LU Utah 795, 481 4,477 2, 638 





* Eggs and fry. 
There was but very little rainfall during the summer of 1900 and a 
lack of snow the previous winter, consequently the mountain streams 
were much diminished and the supply of water in the reservoirs was 
considerably lessened; but, by utilizing the creek water as far as 
possible, no great inconvenience was experienced. In order that the 
work of the station be not jeopardized by an insufficient water supply, 
a connection was made between the creek water pond and the main 
supply pipe from the spring reservoirs, by a 12-inch wooden pipe. 
With this arrangement either spring or creek water can be used for 
the hatchery and ponds. The creek water is perfectly clear for nine 
months in the year, and never exceeds 60° F.; hence it is really pref- 
erable to the spring water after the eggs are hatched, as it contains 
plenty of food and air, in which the spring water is entirely deficient. 
In using the creek water in winter, it can be tempered by the water 
from the warm spring, which has a uniform temperature of 77°; 
accordingly the spring has been partly inelosed by a wall, which it is 
proposed to carry to a height of 43 feet, whereby the warm water can 
be flumed into the creek water ditch and thus prevent its freezing in 
winter. 
BAIRD STATION, CALIFORNIA (G. H. LAMBSON, SUPERINTENDENT). 
At the beginning of the fiscal year the racks were in place and the 
river closed to the ascent of salmon above the station. Numerous 
repairs were made to the buildings, a new spawning-house was con- 
structed, and provision was made for canning salmon as fish food. 
