86 PRACTICAL TROUT CULTURE. 



water with feather or brash they will stand, but a 

 sudden jar is to them at this age certain death. 

 We have known a pan-full of eggs to be destroyed 

 by the slipping of the feet of the operator and tli^ 

 knocking of the pan against the side of the hatch- 

 ing-house. We have frequently endeavored to 

 transport freshly impregnated ova for the benefit 

 of friends who were desirous of studying their de- 

 velopment ; we have packed them with the greatest 

 care, carried the vessel in which we had placed 

 them in our hands, and, in short, taken every pos- 

 sible precaution, but in every case miserable fail- 

 ure was the result Ten days after impregnation 

 is the earliest period at which we have been enabled 

 to save even a small percentage after a short jour- 

 ney. The only method we can suggest for this 

 purpose is the transportation of the parent fishes 

 and performing impregnation upon the spot. This 

 difficulty of obtaining early spawn has greatly re- 

 tarded the study of the embryology of iishes in our 

 country ; and should a plan be devised for their 

 removal, a great impetus would be at once given 

 to original research in this most interesting branch 

 of natural history. 



