REPORT OF COMMISSIONER OF FISH AND FISHERIES. 53 
September 19, a temporary hatchery was built for the earlier take of 
eggs, the building being supplied with water by gravity from a small 
brook. 
From August 19 to September 11 four slat traps were constructed, 
one being placed in the Clackamas dam and the others on the shallows 
below, at the lower end of the ripple, in the swiftest water, and in such 
a position that the current passed through, leaving the fish stranded. 
Wings were extended from the trap mouths upward at an angle, throw- 
ing nearly the entire volume of the stream through the slats. The fish 
were then surrounded by a seine, which, being drawn downward, forced 
them into the trap. Fish were also captured by means of dip nets and 
the seine. 
The period oceupied in collecting eggs was from. August 28 to No. 
vember 6, 1889, the production being 4,514,000 from 957 fish. The 
largest day’s operations, September 27, yielded 208,000 eggs, the small- 
est day’s production being 4,000. There were only two days when no 
eggs were taken. No record was made of the number of male fish 
caught; they were, however, largely in excess of the females. 
Mr. Reed, of the Oregon Fish Commission, received 1,000,000 of the 
eggs late in October, 1889. These were hatched and released, under 
State supervision, at the Cascades on the Columbia River. All other 
eggs taken were hatched at the station, and the fry, 8 to 10 weeks old, 
deposited in Clackamas River and Cedar Greek. The distribution of 
fry extended from November 5 to April 15, 1,000,000 being conveyed 
7 to 10 miles up the stream and put owt in small lots in the rapids. 
The fry liberated amounted to 85 per cent of the eggs retained at the 
Station. 
All eggs were measured in‘a eup of 1,000 capacity and remeasured 
just prior to hatching. 
On November 7 the brook had increased in volume, in consequence 
of rainfall, and the pumping outfit was but little used in the subsequent 
operations. 
From January 2 to 8, 1890, there was snowfall and such cold weather 
that it was with difficulty the hatching troughs were prevented from 
filling with ice, the thermometer registering as low as zero. Another 
cold spell prevailed late in February, when the water in the station 
was down to 31° F. On February 1 the river rose 14 feet, covering to 
a depth of 3 inches the grounds occupied by the hatchery and quarters 
buildings. 
