The great objection to the employment ot the above-named lamps is the difficulty that is experienced in lighting the wick from the cooling of the lard, and consequently hardening around the wick. To remedy this incen-venience, an improvement has been invented by Isaac H. Bartholomew, of Northford, Ct., who has taken measures to secure a patent.-The inventor uses an additional oil lamp, and a copper or other metallic tube, which is suspended over this last-named lamp, and furnished with reflectors, by which the lard round the wick of the other lamp is melted and also the lard in the body of the lamp. Both apparatus being only used until the purpose is effected, when the oil lamp is extinguished and the heat conductor removed.