THE PROPAGATION OF THE GOLDFISH 



All the openings are protected by screens, those of the roof by gauze 

 netting and the sides by i/j^ inch-mesh wire screens to exclude obnoxious 



FLAN. 



FIG. 58 Elevation, plan and section of a Greenhouse for Goldfish propagation. 



A-A Line of section. 



B Cement basins, 3^ 9'' x 3' o^^ x \' ^^' . 



C Shelves and Hatching tanks, %' \a" x i' i>" x i' 1" . 



D Rearing tanks, 4' o" x 8' o" » \' -i," . 



E Oil or gas stove. 



F Ventilator. 



G Detail of Roof supports to prevent dripping. 



insects but to permit small flies, gnats, mosquitoes and other harmless in- 

 sects to enter and deposit their eggs, the larvae serving as food for the 

 young fishes. 



Heating arrangements other than a portable odorless oil stove or a 

 small coal stove are not required, and these need only be employed in the 

 most inclement weather; experience having proven that goldfishes thrive 

 best when not kept in too warm temperature, 45° to 50° F. being better 

 than higher, and if no rapid changes take place those just above freezing 

 are not injurious, except to the transparently-scaled Chinese breeds developed 

 in a warm climate. Warmer water is necessary during the breeding season. 

 The sash of the greenhouse should be arranged to open in the direc- 

 tion of the prevailing summer winds. 



. The principal reasons for failure to rear many young fishes, apart 



105 



