PATENT ROLLER SPAWNING BOX. 85 



gentle current can flow through the under part of the box. 

 This current is meant to be so regulated, that when the 

 pan, C, is placed about an inch from the turning roller, all 

 the small stones which the Trout may whip through the 

 upper screen will fall short of the pan, the eggs being 

 lighter will be carried by the current into the pan, while 

 a great part of the dirt, &c., which may collect on the low- 

 er screen, will be carried up over the pan and entirely out 

 of the box. The under screen may be made of tarred mus- 

 lin or mosquito netting. But wire cloth (8 or 10 meshes 

 to the inch), keeps much the cleanest, and we are inclined 

 to think it best for the purpose. 



A brush may also be placed under the forward roller; 

 so that every time the roller is turned the screen will be 

 perfectly cleaned. 



The box looks, at first sight, somewhat compli- 

 cated in structure, but is, in reality, perfectly simple. 

 Any one who lias a knack of using tools can make such a 

 box, which would answer the purpose perfectly. The cost 

 is very little more than that of the old screens, (same area). 

 The extra expense for two rollers, two hinges and handle, 

 being, perhaps, two or three dollars. 



We are now ready to sell, for a moderate price the right 

 to make and use such boxes, and will give to purchasers 

 full description, &c. Address, Seth Green & Collins 

 Caledonia, N. Y. 



