4O Trout Culture. 



water and mixed with the eggs. A hatch of 

 sixty per cent, was thought very good in those 

 days, and so undoubtedly it was, if the result be 

 regarded by the light of our modern knowledge. 

 The thing would seem to be almost impossible, 

 but for one fact lately made public by Mr. 

 Jackson, of the Southport Aquarium, whose 

 microscopic investigations of the movements of 

 milt in water are very important. He tells us 

 that when milt finds itself in water the sperma- 

 tozoa distribute themselves throughout it, each 

 keeping an equal distance from the other, so as 

 to miss nothing. In fact, he compares the 

 appearance of these objects, seen in the field of 

 a microscope, with the patterns of shot, as ad- 

 vertised by makers of close-shooting guns ; but 

 points out that the regularity of the distance of 

 the spermatozoa from each other was almost, if 

 not quite, invariably observed, each one main- 

 taining its position relatively to the rest, as the 

 milt spread through the water. This is a matter 



