Filters. The employment of a common flower-pot, of largo dimensions, which may be suspended to a beam, or otherwise secured in an elevated situation, makes a good and inexpensive filter. Into this pot lay a mixture of clean sand, and some charcoal broken into bits about the size of peas, and into the hole of the flower-pot place a small plug, drilled through the centre, by which the filtered water may be conducted to the pitcher he-low. The water may be doubly filtered by employing two flowerpots, one suspended over the other, with a piece of sponge in the hole of the pot, the under one being prepared as directed. The sand and charcoal should occasionally be taken out and well washed, or be replaced by new materials.