PATENT ROLLER SPAWNING BOX. 



My partner, Mr. A. S. Collins, has recently invented an 

 improvement in tlie method of taking natm-ally impreg- 

 nated spawn. This improvement removes many of the 

 objections to Ainsworth's screens, as formerly used, and is, 

 in my opinion, of very great value. We have had one in 

 operation at our ponds the whole of this season ; it has 

 worked to our perfect satisfaction, and next year (1870) we 

 shall put them down in every race we have. The princi- 

 ple used is that of the Ainsworth's screens, and the improve- 

 ment consists in the method of collecting the eggs. 



Fhl 



Figure 1, represents a small spawning box with a 

 portion of the side removed. Figure 2, (on the next 

 page), is an enlarged view of the front of the same 

 box. At A, is seen a double row of coarse wire 

 screens, eight in number, (three meshes to the inch). 



