The intimate connection which sparks from locomotives have with forest fires renders every attempt at improvement of interest to the forester. We recently noted the praiseworthy efforts of a Boston railroad in this direction. We now have to record that at a recent meeting of the Franklin Institute of Philadelphia, a paper was read, describing Rufus Hill's spark arrestor for locomotives, which has been put upon 213 locomotives built at the Baldwin locomotive shops, and has been found to work well. Mr. Hill is master mechanic of the Camden and Atlantic Railroad, a road always foremost in endeavoring to meet popular demands for railroad comfort and convenience.