364 



INDEX. 



effect oflight on, 42, 43 ; enemies to 

 hatching, 130; hatching, 124- 145 ; 

 how to tell what eggs will produce 

 good fish, 142 ; how to tell dead, 

 134; how to tell percentage of im- 

 pregnated, 137-139; impregnation 

 of, 99 - 1 12 ; method of packing, 

 146; number to a fish, 119; plates 

 of, as seen under a magnifier, by 

 Professor Agassiz, 143, 144 ; size of, 

 118; structure of, 118. 



Embryos, darkness necessary to de- 

 velop, 63 ; development of, 141 ; how 

 to make produce healthy fish, 183 ; 

 sickly, 184 ; to insure strong and 

 healthy, 184 ; of perch, 336 ; of sal- 

 mon, 328-335. 



Experiments, general account of, 323 

 -327; with alevins and young fry, 

 326; in impregnating eggs, 324; 

 large trout, 327. 



Eyes, form of, in trout, 217. 



Filtering Tanks, covers to, 53 ; de- 

 scription of, 51 ; filters for, 52; ne- 

 cessity for, 50 ; place of, 52 ; plate 

 of, 51; a remedy for sediment, 50; 

 size of, 52. 



Filters, a necessity to cleanliness at 

 hatching time, 133 ; construction of, 

 and material for, 50-52. 



Fish, ancient fish story, 303 ; freezing, 

 300, 301 ; handle carefully, 241 ; list 

 of spawning time, 290 ; most valu- 

 able kinds found in Missisquoi River, 

 294 ; value of those found in Miri- 

 michi River, 293. 



Fly-Fishing, account of, 302. 



Freshets, loss occasioned by, 8 ; need 

 of precaution against, 12 ; guards 

 against, 39. , . . 



Fungus, account of, 126 ; description 

 of parasites found in, 277 ; effect of, 

 on eggs, 127; how to detect the 

 presence of, 127 ; microscopic exam- 

 ination of, 277 ; plate of parasites 

 found in, 277 ; prevention against, 

 127, 128: salt a cure for, 278; why 

 to dread, 126. 



Glass Grilles, cost of, 56 ; compared 

 with charred troughs, 56, 308 ; 

 Coste's arrangement, 64 - 67. 



Gravel, classification of, 62 ; depth 

 of, in troughs^ 61 ; laying in troughs, 

 60-62; obtaining, 60; preparation 

 of, 61 ; quantity to be used, 61 ; size 

 of, 60 ; washing of, 61. 



Green, Setji, method of watching 



progress of embryo, 136 ; a report 

 of shad spawning on the Hudson 

 River, 289 ; rule for time of hatch- 

 ing, 140. 



Hatching Apparatus, aqueduct, 48 ; 

 distributing spout, 53 ; filtering ar- 

 rangement, 50 ; supply reservoir, 47 ; 

 troughs, 54. 



Hatching the Eggs, Ainsworth's 

 table, 141; dangers to, 125; daily 

 examination while, 132; examining 

 the progress, 136 ; hatching early, 

 143; interest felt in, 141 ; labor in 

 picking over the eggs while hatch- 

 es* J 3S; plates of microscopic 

 changes in eggs while hatching, 143 ; 

 protection against danger to, 125 ; 

 skill in, 124; time required for, 

 140. 



Hatching House, aqueduct in, 48, 

 49 ; kind of, 44 ; lighting of, 46 ; 

 location of, 45 ; necessity of security 

 in, i3o;shape of, 46; size of, 45; 

 troughs in,. 54- 64 ; use of gravel in, 

 60 ; where to look upon entering, 

 132; warmth of, 45. 



Hatching Troughs, advantages of 

 charred wood over other material, 

 56 : construction of, 58, 59 ; covers 

 to, 92-64; comparative expense of 

 material, 56; description of M. 

 Coste's, 64-67; glass grilles used 

 in* 56, 57 ; glass used in another 

 form, 66; construction, 63, 64; ma- 

 terials for, 55 ; placing the, 57 ; 

 preparations for use, 59 ; safeguards 

 to, 59, 60 ; shape and size, 57, 58 ; 

 screens for, 59. 



Impregnation, amount of, 99-112; 

 absorbing power of eggs at time of, 

 102-104 > average yield by dry meth- 

 od, 104; closing notes on, 117 ; dis- 

 covery of dry or Russian method 

 introduced into this country, 108 ; 

 eggs exhibited at American Fish 

 Culturists' Association at Albany, 

 prepared by dry method, 106 ; ex- 

 periments by M. Vrasski, 100 ; ex- 

 periments in, 323 ; further directions 

 for, 114; how to tell percentage of, 

 137 - 140 ; in water, 99 ; injury by 

 water at time of, 100, 101 ; interest- 

 ing consequences of dry method, 

 109 ; list or table of, by dry method, 

 at Maine State Salmon -Breeding 

 Establishment, 104; make quick 

 work, 115; modus operandi, 112; 



