H. D. Mandeville, of Cedarburg, Wis., has taken measures to secure a patent for an improvement in lime kilns. The fire places and heating flues are arranged around the shaft of the kiln in such a manner that the fire doors are all brought to one side or front of the kiln, but the heat is distributed into the shaft all around by the flues which are so arranged that they can all be cleared through the fire-doors. The fire places are constructed with spaces or chambers in the masonry above, whereby they are relieved of the weight of wall, and are more easily repaired when required.