Fresh-Water Clams
or mussels will live in confinement, and a few make an interesting addition to a collection. Water-snails act as scavengers for the under-water settlement, and a handful of them may be added to form a sort of street-cleaning department. Caddice worms and the little fresh-water shrimp which you find among the water-plants make excellent food for your fish.
Avoid Salt-Water Sand,
stones, and shells, for the salts they contain are injurious to fresh-water creatures. Do not change the water in the tank after it is in running order; but as it evaporates replenish with fresh water.
CHAPTER V.
PIGEON-LOFTS AND BANTAM-COOPS.
The best place in the world for boys is out-doors, breathing good fresh air, and the best place in the world for pigeons and chickens is out-doors, breathing good fresh air. Our modern environments too often limit the amount of out-door space which boys can occupy, and also limit the supply of fresh air they can furnish their pets.
In making designs for the latter we must take into consideration the limited space of a city back-yard, as well as the fact that during the extreme cold weather pigeons, chickens, and boys, all need some warm retreat where they may roost or sleep.
Indeed, chickens really