4320. Carbonic acid gas accumulated at the bottom of wells and pits, which renders them noxious, and often fatal to life.
4321. Offensive Cesspools.—Sulphate of zinc can be purchased of any druggist, in the form of a salt, and a pound of it dissolved in two pails of warm water and thrown into an offensive cesspool, will soon deodorize it.
4322. Directions for Pruning Vines.—In pruning always cut upward, and in a sloping direction.
4323. Always leave an inch of blank wood beyond a terminal bud, and let the cut be on the opposite side of the bud.
4324. Prune so as to leave as few wounds as possible, and let the surface of every cut be perfectly smooth.