Glasses
The glasses, or globes, should be moderately large, with wide mouths, and three-fourths filled with water. For two fish the globe should be at least a foot in diameter; and for three or four fish, sixteen inches. They should be kept in a cool place--never exposed to a burning sun, or the heat of a fire. Too many should never be crowded into one glass. A few branches of box should be kept in the globe, for them to rub against, which should be changed once a week.