APPENDIX. 251 



I tope by next September or October to be able 

 to inform my readers where tbey will be able to 

 get trout and salmon ova re^dy for their boxes. 



In order to xmderstaajd what actually happens 

 during the curious a,nd instantaneous act of fecun- 

 dation, I have examined the milt under the micro- 

 scope, taken at the moment jErom the fish. What 

 appears like tth'IJ? to the naked eye is, in fact, one 

 living mass, coip!t.Rtiji;i,ing myriads ajid myriads of those 

 mysterious creatures called by physiologists sper- 

 matozoa. Each seems endowed with independent 

 power of motipn, and, I almost thinks voEtion. 

 Under the microscope they are seen fto hurry and 

 push about, as if in search of something on to 

 which they may atta^ th,emselves ; thaj; something 

 is the OTum; ibut having found it, they attach 

 themselves, and, I believe, actually enter into its 

 substance. 



0UT-D.0OE APPAEATUS. 

 {•.ageSS. 



The accompanying engraving will give the reader 

 an idea of how an out-door apparatus may be con- 

 structed (see p^ge 83). The plan of it was kindly 

 given to my friend Mr. Ashworth, as giving an 

 idea of the mjejtjiod Jie bas adopted to hatch so many 

 thousands of salmon. It vsdil be seen that the boxes, 

 which are 6 feet long, by 12 inches wide, and 

 7 inches (Jeep, are p^^d one above another, so that 

 the water shall fajj from the outflow of the one 

 into the inflow of the next. The inflow from 

 the main stream must, of course, be regulated by 

 a hatchway (where the man is working with the 

 fish-kettle and net), and be guarded by perforated 



