66 GOLDFISH VARIETIES AND 
taxed to the fullest. At such times the extra volume of water for the 
storage of fish stock will be keenly appreciated. An economy of space can 
be effected by building wooden tanks to stand over the section marked 
“Breeding Ponds” in figure 50, thus making two rows here instead of 
one. The wooden tanks should be somewhat narrower than the lower 
concrete pools. 
L ihe 
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Sete TSs STeTooks & as|| if 
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& ores & Ss 
vin OE EE YS a a eg 
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8 
9 
N 
REARING PONDS 
FOR LARGE YOUNGSTERS COMETS y 4 
N 
NX 
FANTAILS NYMPHS ETC. 
DRIVE WAY 
Fic. 50. WHOLESALE BREEDING ESTABLISHMENT, SHOWING GREENHOUSE AND 
Outpoor CoNcrETE TANKS 
Goldfishes are hatched in the greenhouse from February until April. 
The young, as stated in the previous chapter, should not be placed out 
until the weather is settled, but there is a magic about outdoors which puts 
growth and vitality into the fish which the cunningest devices of temper- 
ature, plants, food, aeration, etc., cannot successfully imitate in the green- 
house. There has been much speculation as to why fishes do not do as 
well as might be expected in greenhouses. The author suggests that the 
water is too dead, owing to lack of evaporation, the atmosphere being 
already charged with dampness. Evaporation produces cold. The cold, 
oxygenated water drops to the bottom, thereby setting up a beneficial cir- 
