76 REPORT OF COMMISSIONER OF FISH AND FISHERIES, 



of tho station was taxed to its utiuost it was necessary to discontinue 

 colliM-tions. The rack was at once opened, that the remaining sahnon 

 might ha\e free passage to the upper waters for spawning. A large 

 portion of tiie rack was saved and stored for future use. The total 

 loss of eggs Avas l,;}-t7,850. or about 13 i)er cent of the entire collection. 



The females were spawned in the same manner as that practiced 

 throughout theColum))ia River territory, except that af t(U" the greater 

 portion ol" the eggs had been renu:)yed an incision was made in the 

 belly of the tish, the eggs shaken free from tlie enfolding sac, and 

 then pressed from the vent. In this manner th(» oo;^ take was added 

 to materially, ])ut the eggs thus taken were not of the best ([ualit3\ 

 On November 10, after a period of incul)ation of fift}' days, the eggs 

 began hatching, and owing to lack of space it ])ecame necessary to 

 plant the greater portion of the fry as soon as they hatched. 



With the view to affording them as much protection as possible, a 

 series of dams was thrown across the small branch leading from the 

 hatchery to the Clackamas, it having first been cleaned, and into the 

 small ponds thus made throughout its length the fry were lilierated. 

 B\' Jaiuiary 1 over 6,000,000 fry had been planted, and the balance, 

 2,412,000, were held in troughs and outside tanks to be reared for a 

 time upon artificial food. In each tank 36,000 fry were placed and in 

 each trough 18,000, but on January 9 it was necessary to thin them 

 out ])y, distribution, leaving 15,000 in each tank and 5,000 in each 

 trough. The fry loss for the year amounted to 128,866, or 1.48 per 

 cent of those hatched. 



During September and October 220,000 eyed quinnat-salmon eggs 

 were received from the Oregon Fish Commission. Of these, 10,000 

 were loaned to the Portland Carnival in connection with its exhibit 

 and 175,472 fry hatched from the remainder were planted in the 

 Clackamas Kiver. 



In Februar}^ 900,000 white-fish eggs were received from the North- 

 ville, Mich., Station, and after being successfully hatched the result- 

 ing fry, numbering 750,000, were planted in Lake Sequalitchew, 

 Washington. 



In July and August the rainbow and brook-trout fry carried over 

 from the previous year were planted under the direction of the Oregon 

 Fish and (jame Association. 



In one of the rearing-tanks 20 quinnat salmon had been held until 

 18 months old, and on June 26, 1902, copper tags were placed upon 

 them and they were liberated in the Clackamas Kiver. 



At the request of the conunittee in charge a model salmon hatching- 

 house was installed as an exhibit at a carnival held in Portland, Oreg. 

 All the equipment used was made one-third the regular size and was 

 furnished b}' the committee. The Commission loaned cans, packing, 

 and such other articles as could be spared. The installation of this 

 exhibit was under the diivction of the superintendent until completed. 



