REPORT OF COMMISSIONER OF FISH AND FISHERIES. 43 
DULUTH SraTion, MiInNEsoTa (R. O. SWEENY, SR., SUPERINTENDENT). 
1889-90. 
Operations consisted principally in developing eggs transferred from 
other stations, though a number of pike perch eggs were collected. 
Whitefish. A bout 26,250,000 whitefish eggs, in seven consignments 
of two cases each, received from Northville Station January 4 to 31, 
1890, produced 24,850,000 fry. Some of the eggs hatched prematurely, 
owing to the high temperature attained during their transfer, resulting 
in the release of about 7,000,000 fry from January to March, inclusive, 
in advance of the normal nate. which commenced sheik April 15. 
The fry were placed in Lake Superior, off the mouth of Lester River. 
Brook trout.—LKges to the number of 30,000, received from Northville 
February 3, 1899, began to hateh March 21, and 27,000 fry were released 
June 12, in Baptism River; 1,000 fry were held over to the succeeding 
fiscal year for further rearing. 
Lake trout.—1 000,000 eggs received from Northville January 5, 1890, 
in four cases, produced 935,000 fry ; of these, 400,000 of premature hatech- 
ing were liberated in Lake Superior in April. There were also 300,000 
released in June. The balance were held for further rearing. The 
normal hatching of the eggs commenced March 21, 
Loch Leven trout.—There were 12,000 Loch Leven trout eggs received 
from Northville February 27, and from these 11,000 fry were on hand, 
in rearing troughs, June 30, 1890, 
Von Behr trout——Kgegs to the number of 8,000 were received from 
Northville February 27. The fry produced therefrom, and on hand June 
30, 1890, amounted to 7,280. A consigument of eggs from Cold Spring 
Harbor, New York, was without result, they being dead on arrival. 
Landlocked salmon.—There were 48,000 landlocked salmon on hand 
in troughs and rearing ponds June 30, 1890, which were the product of 
60,000 eggs received from Schoodic Station in March. 
Pike perch.—On May 5, 1890, 600,000 pike perch eggs were collected, 
the fry produced therefrom amounting to 580,000, which were released 
May 9 to 25, at the mouth of Lester River. - 
The water temperature, after remaining at 32° F. for four months, 
rose to 34° April 10, 1890, the mean morning temperature during April 
being 34,3;°, and during May 453°. In February the mean air tempera- 
ture was 12$°, maximum 40°, and minimum 16° below zero. 
1890-91. 
During this year many improvements were made looking to the com- 
pletion of the station. In consequence of the denudation of the land 
areas along Lester River (caused by disastrous forest fires, the opera- 
tions of lumbermen, and the clearing incident to the suburban growth 
of the city of Duluth) it was found that the gravity supply of water to 
the hatchery from that stream could no longer be relied upon. When 
the hard freezing weather occurred the stream was dried up, and the 
lake was drawn upon, water being obtained by pumping. 
