HATCHING-HOUSES AND APPARATUS. 41 



CHAPTER IV. 



HATCHING-HOUSES AND APPARATUS. 



THE hatching-house is a modern invention. A 

 simple trough by the side of the stream, guarded 

 by wire screens at each end, having the bottom 

 covered with sand or gravel, and a cover with lock 

 and key over the whole, was the only apparatus 

 used by Pinchon and Jacobi ; Remy inclosed his 

 spawn in perforated tin boxes ; and a champagne 

 basket anchored in the stream was frequently used 

 as a means of hatching ova by the early French 

 pisciculturists. The trough of Pinchon and Ja- 

 cobi is still retained in some of our largest Ameri- 

 can establishments, and was used at Troutdale 

 until 1870. In our latitude, out-door hatching- 

 troughs, except on a very small scale, are entirely 

 out of the question. Trout- spawning takes place 

 during the coldest and most inclement season of 

 the year, and a covering is positively required 

 even a stove in the hatching-house being a luxury 

 by no means to be despised. Three styles of 

 hatching apparatus are now in use : the trough, the 

 Coste (or, more properly, Caron) arrangement, and 



