REPORT OF COMMISSIONER OF FISH AND FISHERIES. 53 



September 111, a teiupoiary liatcliery was built for the earlier take of 

 eggs, the buil(liugi)eiiig sui>pli('(l with water by gravity from a small 

 brook. 



From August 19 to September 11 four slat tra]>s were constructed, 

 one being placed in the Clackanuis 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 hsh 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 l>y 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 occupied in collecting eggs was from August 28 to No 

 vember 0, 1889, the production being 4,oll,000 from 957 hsh. 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 Elver. AH other 

 eggs taken were hatched at the station, and the fry, 8 to 10 weeks old, 

 deposited in Clackamas River and Cedar Creek. The distribution of 

 fry exteiuled from November 5 to April 15, 1,000,000 being conveyed 

 7 to 10 miles up the stream and put out 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 cup of 1,000 capacity and remeasured 

 just prior to hatching. 



On Noveml)er 7 the brook had increased in volume, in consequence 

 of rainfall, and the jjumping 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 dittlculty 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 Fel)iuary 1 the river rose 14 feet, covering to 

 a depth of 3 inches the grounds occupied by the hatchery and quarters 

 buildings. 



