American Fisheries Society. " 143 



you could not depend upon the air temperature keeping the tem- 

 perature of your ponds up to 70°. If your air temperature i.s 

 low the temperature of your water would fall. 



]\Ir. Clark : Certainly — if we have a snow storm in June or 

 July up in our country, why, we do not expect "to keep a high 

 temperature. 



Mr. Beeman : Those conditions did not quite prevail at our 

 hatchery, but I was informed that they did have snow in Boston 

 at that time. But it is possible to have a week's storm where 

 the air temperature would be from 50° to 60°. Under such cir- 

 cumstances the spring water would reduce the temperature of 

 the ponds to a danger point, and that is the point I desire to 

 get at. 



Mr. Seymour Bower: 1 think Mr. Clark's idea is to admit 

 just sufficient water to hold the pond up, merely to offset evapo- 

 ration. In warm weather the pond exposure will maintain the 

 temperature; it will go down in cold weather, of course. The 

 idea of admitting spring water is merely to maintain the level 

 of the ponds. If the weather is warm you can use the spring all 

 right. 



]\Ir. Clark : I wish to state right here that this idea of the 

 spring water is not original with me — I got this from Mr. Ly- 

 dell — I do not want to steal some other man's thunder. When 

 I visited Mr. Lydell's place he told Mr. Bower and Mr. Bower 

 told me the same thing, that if they only had suflicient spring 

 water there they would be all right; that if they could turn in 

 spring water to these ponds, in some of these roily times it would 

 hel]i them out ; and when they went to my place 1 showed them 

 what I could do and they said, "do it by all means," and that i^ 

 where I got my idea of having the spring water piped over there. 

 It may lie there two or three years and never be used to any great 

 extent, biit when I have it there it will hold the levels up, and 

 there will be no trouble during a storm of two or X\\vvv days. 

 How convenient it will be to put on Just a little water to keep 

 your pond water going along in just the same condition ! Of 

 course if the temperature goes down we cannot help it. 



]\Ir. Lydell : As I understand it, these gentlemen are breed- 

 ing large-moiith bass, and as ^Ir. Clark has been instructed to 

 breed only small-mouth l)ass. he will find he has a different ])ro]i- 



