May fly, introduction of, [12]

Moss, great water, [13]

Mussels, [12]

Nautonecta glauca, [10], [64]

Natural food, importance of, [24]
natural food for fry, [48]-9

Netting for rearing ponds, [31]

Ova beds, artificial salmon, [85]

Ova, care of, [36]-9
dead, removal of, [37]
hatching of, [39]
of coarse fish, [90]-1
of sea-trout, [87]
placing in hatching trays, [34]-6

Perch, [19], [90]-1
suitable water for, [19]

Pike, [18]-9, [90]-1