xiv CONTENTS. 



CHAPTER 11. 



PAGE 



The Abtificial iNctfBATioN OF Ova ' . 31 



Water Supply **• 



The French Apparatus 32 



Comparison of Slate and Earthenware Trays 35 



The Depositioh of Ova 37 



Volume of Stream required 38 



Cisterns **• 



Taps 41 



Number of Trays desirable «*■ 



Arrangement of Trays 46 



Cisterns 50 



Temperature **■ 



Sheds 51 



Apparatus for Streams 52 



The Grille and Gravel compared 55 



Cleanliness desirable 57 



Floating Apparatus 58 



The Catching of Fish 59 



Preponderance of Males over Females it. 



Evidence of Spawning condition 60 



Articles necessary in Manipulation . • 61 



Unripe or Infertile Ova 63 



Method of Manipulation ib. 



Time of Spawning 65 



The best kind of Nets to Use 66 



Sitting Room Apparatus 68 



CHAPTER III. 



On the TEANsroET oe Ova 71 



Plan for Transmitting fresh-taken Ova by Rail ... ib. 



Cans for Transmitting Ova 72 



Conveyance of Ova to Australia 73 



Conveyance of Ova in Charge 76 



Method of Packing and Conveying Vivified Ova ... 77 



Tenderness of Greyling Ova 78 



