[189] 



POND CULTURE. 



f)55 



Page. 

 148 

 151 

 168 

 172 

 173 

 49 



Summer fisheries, titue for 



Tables for sorting, description of. 



Tank for keeping fish for market 



removing fish from 



size of. 



Tap, construction of. 



drawing of. 48, 141 



exit, construction of 48 



houses made of stone 50 



size of. 49 



Fcichmann cited 53, 58, 80. 85, 96, 101 



Temperature observations desirable 120 



of the -water 98, 18J 



change in.. 

 Tench cultivated with carp 



culture 



exhalation of carbon by 



in raising-ponds 



number of, in a keg 



suited for stock-ponds 



Avintering of 



Thieves, preventions against 



Three-fold net, description of. 



Tinea vulgaris 



Transportation offish 



Trapa uatans 



Treskow^ 



Trout, food for 



lake, culture of 



147 

 129 

 129 

 107 

 80 

 165 

 95 

 123 

 180 

 156 

 129 

 163 

 102 

 163 

 136 

 136 



pond, depth of 135,136 



making of 134 



spawning-ditch in 135 



temperature of 135 



value of sea 130 



Trutfa fario 134 



lacustris 136 



salar 136 



trutta 136 



Tscheiner cited 103,101,166 



Tulis. description of 152 



for assorting fish 115,1.51 



Turnips, nutritive substances in Ill 



Untica dioica 174 



Veronica heccabunga 1.35 



Vetches, nutritive substances in 110 



Wagner, Christian 133 



Water, aerating of 164 



apparatus for aerating 157 



brook and river 11 



controlled by artificial means 5 



cresses 135 



depth of 5,8,13 



flow of, in ponds 97 



legal right to use 7,13 



letting in and out 43 



letting off 110 



pipes for drawing ponds 45 



pond 11 



Page. 



Water, proper height of. 99 



quality of 7 -jq 



quantity of 7 g 



regulating of supply of 45 



regulation of 97 



snow and rain n 



spring 10 



temperature of gg 



to use in fish tanks 169 



watching of igj 



Weirs, bottom of 44 



construction of 43 



with locks ^ 43 



Wheat bran, nutritive substances in no 



liusks, nutritive substances in 110 



nutritive substances in m 



Wheelbarrows, employment of 27 



Whey, nutritive substances in ill 



White-fish culture 1.37 



Wicker-work, coveringof. 35 



fastening 37 



making of. 36 



material for 36 



Willows, cuttingof 174,175,176 



for fascine covering 33 



for wicker-work ,36 



income from 174 



on ditches 32 



on dikes 30 



planting of.. 174,176,182 



variety to select 176 



yields of, per year 175 



Winter fisheries 147 



time for 148 



Winter ponds 55 



depth of 61 



draining of 128 



fish dyingin 125 



mdicationsof danger in 124 



necessity of 63,122 



requisite for 62 



size of 61,73 



stocking of 121 



used for agriculture 129 



water for 61 



water supply for 122 



Wittingau fisheries, description of 159 



pond, drawing of 158 



farm 131, 146 



fisheries 158 



size of 89 



yield of. 161 



AVolfi", Professor E., cited 10.5,108,109,110 



Wood-covering for dikes 38 



AVooden tap-houses 50 



Worms as fish food 109 



nutritive substances in 110 



