38 FISH CULTURE. 



twenty inches at the lower end, contents, four hundred and 

 eighty cubic feet, to sustain nine thousand six hundred 

 young fry, or twenty to each cubic foot of water, from the 

 time they leave the nursury until they are eighteen or 

 twenty months old. Pond No 2; thinking that the water 

 would increase from one to one and a half degrees in tem- 

 perature in passing through pond No. 1, we estimated that 

 a cubic foot in this would sustain three trout from the time 

 they were twenty until they were thirty-two months old, 

 and allowing for loss or sales, reduced the estimated number 

 for this to eight thousand one hundred. We accordingly 

 laid it off ninety feet long, ten feet wide, and intend filling 

 it to the average depth of three feet, which gives twenty- 

 seven hundred cubic feet as its contents, and three fish to 

 each cubic foot. Pond No. 3 ; assuming that the summer 

 temperature of the water in this would seldom rise above 

 56 or 58, we thought that a cubic foot would sustain one 

 trout, and again making allowance for losses or sales, reduced 

 the estimated number to six thousand four hundred and 

 eighty, and so staked off the pond one hundred and twenty 

 feet long, twelve feet wide, and allowed for an average depth 

 of four and a half feet. I would here remark that Mr. 

 Comfort has a spring branch rising three hundred yards 

 away, flowing at right angles and joining that already des- 

 cribed, the supply being double of that just given. This 

 he intends using as accessory in filling his third pond. The 

 united streams flow also through an ice pond below, which 

 he will stock with trout. 



If one is desirous of having ponds of the largest capacity 



