Trout Breeding. 143 



hour, and hard work, to get all the fish in ten cans 

 down to the bottom again and breathing easily. Never 

 let them get to the top ; treat them to an aeration every 

 half hour by the watch, or oftener if they need it, but 

 never let them suffer for a moment. 



When the water is sloshing about on a car or wagon, 

 have no more water in the cans than can be carried 

 with the covers off, and they need not be worked more 

 than once in an hour or two if the water is cool. Take 

 extra care when standing still for an hour or more ; 

 there is then more danger of suffering. 



At the place of deposit compare the temperature of 

 the brook to that in the cans by a thermometer, and if 

 there is a difference of three degrees Fahr., set the can 

 in the brook, adding a little brook vvater occasionally ; 

 take an hour to this if necessary, and when you are 

 satisfied that the fry will not be injurejd by the shock 

 from a warmer or colder temperature, lower the mouth 

 of the can and let them swim out. After all your trou- 

 ble and expense you cannot afford to dump your fry in 

 a hurry and trust to luck to their, living through a 

 shock. This is why I always preferi'ed to send one of 

 my own men to plant fry to having^ the owner of a 

 stream come for them. No doubt millions of good, 

 strong trout fry have been killed by the "dumping" 

 process of some unthinking or igriorant man who 

 thought: "Here's the brook and there's the fish; dump 

 'em in." A man may be a very learned jjian and not 

 know how to plant trout fry. 



In 1872 I submitted a plan for aerating water by 

 pumps worked by a band on a car axfe to Prof. Baird. 

 This was afterward used by Mr. Stone in his aquarium 

 car, and was no doubt again originated by him, for it 

 was naturally the first plan that would sug^^est itself to 



