10 



Dr. Henshall answered : "In regard to the black bass I 

 would say with Mr. Seal that it is a question entirely of 

 temperature. I have watched the spawning of black bass 

 all the way from Canada to Florida, and it is entirely a 

 question of temperature. Beginning with Florida as early 

 as March or April, and getting a little later as you go North. 

 I lived in Wisconsin, where within a radius of ten miles 

 there were forty lakes. Some of these lakes were deeper 

 than others, and in the spawning of those bass, even in that 

 circumscribed limit, there was a difference of between two 

 and three weeks ; those in the deeper lakes not spawning 

 until later in the season. In Evergreen Lake the fish did 

 not get through spawning until the later part of August, 

 and the fishing began in September." 



Mr. Frank Clark then read a paper entitled ' ' Rearing 

 and distributing trout at the Northville Station of the 

 United States Fish Commission." 



After the paper was read, the Chair called for discus- 

 sion. 



Dr. Parker asked : "I would like to inquire of Mr, Clark 

 what has been the expense of rearing, say 10,000, of those 

 trout until they are one year old V 



Mr. Clark answered : "It is rather difficult to tell what 

 it would cost to rear 10,000. Of course, with such a small 

 number as that, you would need the same help that you 

 would to rear a much larger number. I cannot tell the 

 exact proportionate cost, but I think that our total liver 

 bill last season was something like $800 ; that included 

 the feeding of fish that gave us about 120,000 eggs, in 

 addition to feeding 150,000 fry to be held until one vear 

 old." 



Mr. Mather said : ' ' AYliile Mr. Clark was reading his pa- 

 per, he looked at me, because he knew that I did not agree 

 with him. The losses would amount to something, and the 

 expense will be large, and I do not believe that it is econo- 

 my to-dav for the Fish Commission to raise trout to be a 



