KEPORT OF COMMISSIONER OF FISH AND FISHERIES. 



19 



14,736 Atlantic saliuon, 490 laiKllocked salmon, 31 saibling, 490 Swiss 

 lake trout, and 490 Loch Leven trout, wliicli were further held for 

 observation during' the winter months. Their history while subjected 

 to rearing methods, from June to October, 1890, is shown below: 



In addition, there were brought over from the last fiscal year 1,471 

 fish, 1 and 2 years old, which are included in the following statement: 



In July, 1890, the water temperature rose to a maximum of 72'^ F. in 

 rearing troughs fed from Craig Brook. In conduits supplied in part by 

 spring water the temperature was 69'^, and after i)assiug through four 

 rearing troughs in succession it was 72°. In August the water in tlie 

 hatchery was 58° to 76'=' ; in open-air troughs, 59° to 75°; and in the 

 ponds 58° to 74^°. Experimental lots of salmon fry were kept in two 

 neighboring streams, and in one of them, at East Orland Bridge, the 

 water rose August 4 to 82° without injuring them. The September 

 temperature was 69° to 53° ; October, 63° to 46° ; November, as low as 

 37°, from 24th to 29th; January, 32 Jo to 35°, with nearly all the fish 

 remaining in the open-air troughs; February, 32^° to 36°, witli weather 

 comjparatively mild and the ice on Alamoosook Lake 29^ inches thick. 



