i68 



NATURE-STUDY 



(goldfishes especially) and other animals are chilled and 

 often killed in consequence of pouring on them water 

 taken directly from the pump or the city mains at a much 

 lower temperature. Let the new water stand a few hours in 

 the room before making the change, or add warm water 



to it till to the hand 



the two waters are 

 about the same tem- 

 perature. A siphon 

 is useful sometimes 

 in drawing off the 

 water, so as not to 

 disturb the bottom 

 and to prevent the 

 animals from going 

 out. 



The following ani- 

 mals are good for 

 stocking aquaria: 

 Goldfishes (very 

 hardy), small bull- 

 heads, young dog- 

 fish, carp, perch, 

 small sunfish, min- 

 nows and darters, sticklebacks, salamanders, turtles, frogs, 

 tadpoles, crayfish, clams, snails, leeches, dragonfly larvae, 

 electric-light bugs, water-beetles, water-boatmen, water- 

 striders, water-spiders, mosquito wrigglers, and other aquatic 

 insects. 



One thing must be kept in mind, however, and that is that 

 the carnivorous creatures are apt to eat the other smaller 



FIG. 36. Aquarium with Sunfish. 



