TO KEEP A ROOM PURE.
To keep a room purified it is only necessary to keep a pitcher or some other vessel full of water in it. The water will absorb all the respired gases. The colder the water is the greater is its capacity to hold the gases. At ordinary temperature a pail of water will absorb a pint of carbonic acid gas and several pints of ammonia. The capacity is nearly doubled by reducing the water to the temperature of ice. Water kept awhile in a room is unfit for use. The pump should always be emptied before catching water for use. Impure water is more injurious than impure air.
Man, being essentially active, must find in activity his joy, as well as his beauty and glory, and labor, like everything else that is good, is its own reward.
INTERESTING FACTS.
Glass windows were used for lights in 1180.
Chimneys first put up to houses in 1236.