344 



INDEX. 



fish, 130; how to tell dead, 122; 

 how to tell percentage of impreg- 

 nated, 125-128; impregnation of, 

 87-100; method of packing, 136- 

 139 ; number to a fish, 107 ; plates 

 of, as seen under a magnifier, by 

 Professor Agassiz, 131, 132 ; size of, 

 105 ; structure of, 106. 



Embryos, darkness necessary to de- 

 velop, 63; development of, i2g; 

 how to make produce healthy fish, 

 167 ; sickly, 166 ; to insure strong 

 and healthy, 167 ; of perch, 317 ; 

 of salmon, 308-316; of trout, 68, 

 129, 167. 



Experiments, general account of, 

 303 - 308 ; with alevins and young 

 fry, 305, 306 ; in impregnating eggs, 

 304 ; large trout, 306, 307 ; trout 

 eggs and trout, 303 - 308. 



Eyes, form of, in trout, 202. 



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, 121 ; make of, and 

 material for, 121. 



Fish, ancient fish story, 283 ; freezing, 

 280, 281 ; handle carefully, 222 ; list 

 of spawning time, 267, 26S ; most 

 valuable kinds found in INIissisquoi 

 River, 274 ; value of those found in 

 Mirimichi River, 273. 



Fly-Fishing, account of, 283. 



Freshets, loss occasioned by, 8 ; 

 need of precaution against, 12 ; 

 guards against, 39. 



Fungus, account of, 114, 115 ; descrip- 

 tion of parasites found in, 260 ; ef- 

 fect of, on eggs, 115 ; how to detect 

 the presence of, 115 ; microscopic 

 examination of, 257 ; plate of par- 

 asites found in, 257 ; prevention 

 against. 115. 116; salt a cure for, 

 258-260 ; why to dread, 114. 



Glass Grilles, cost of, 56 ; compared 

 with charred troughs, 66, 288 ; 

 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, Seth, method of watching 

 progress of embryo, 129 ; a report 

 of shad spawning on the Hudson 



River, 269 ; rule for time of hatch- 

 ing, 128. 



Hatching Apparatus, aqueduct, 



48 ; distributing spout, 53 ; filterii.g 

 arrangement, 50; supply reservoir, 

 47 ; troughs, 54. 



Hatching the Eggs, Ainsworth's 

 table,. 129; dangers to, 113; daily 

 examination while, 121 ; examining 

 the progress, 124; hatching early, 

 131 ; interest felt in, 129, 130 ; labor 

 in picking over the eggs while hatch- 

 ing, 123 ; plates of microscopic 

 changes in eggs while hatching, 131; 

 protection against danger to, 113 ; 

 skill in, 112, 113 ; time required for, 

 128. 



Hatching House, aqueduct in, 48, 



49 ; kind of, 44 ; lighting of, 45 ; lo- 

 cation of, 45 ; necessity of security 

 in, 118- 121 ; shape of, 46 ; size of, 

 45 ; troughs in, 55-64; use of gravel 

 in, 60 ; where to look upon entering, 

 120 ; warmth of, 45. 



Hatching Troughs, advantages of 

 charred wood over other material, 

 56 ; construction of, 58, 59 ; covers 

 to, 62 - 64 ; comparative expense of 

 material, 56; c'escription of M. 

 Coste's, 64-67; glass grilles used 

 i") 56) 57; glass used in another 

 form, 66 ; make of, 63, 64 ; mate- 

 rials for, 55 ; placing the, 57 ; prep- 

 arations for use, 59 ; safeguards to, 

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

 screens for, 59. 



Impregnation, amount of, 87-100; 

 absorbing power of eggs at time of, 

 90-92 ; average yield by dry meth- 

 od, 93 ; closing notes on, 105 - 107 ; 

 discovery of dry or Russian method 

 introduced into this country, 96 ; 

 eggs exhibited at American Fish 

 Culturists' Association at Albany, 

 prepared by dry method, 94, 95 ; 

 experiments by M. Vrasski, 88, 89 : 

 experiments in, 304, 305 ; further di- 

 rections for, 102 ; how to tell per- 

 centage of, 124- 129 ; in water, 87; 

 injury by water at time of, 88-92 ; 

 interesting consequences of dry 

 method, 97 - 99 ; list or table of, by 

 dry method, at Maine State Salmon- 

 Breeding Establishment, 92 ; make 

 quick work, 103 ; modus operandi, 

 loo ; practical advantages of dry 

 method, 99 ; Russian or dry method 

 more particularly described, 92 - 96 ; 



