Gaseous Illuminants.--By Prof. VIVIAN B. LEWES.--Continuation of this important article, treating of the water gas and special processes, with analyses. Glove Making.--Early history of glove making in America.--Its present aspects and processes. Reversible Ingrain or Pro-Brussels Carpet.--An imitation of Brussels carpet on the Ingrain principle.--Full description of the process of making.--3 illustrations. The Manufacture and Use of Plaster of Paris.--An excellent treatment of a subject hitherto little written about.--Full particulars of the manufacturing process. * * * * * IMPROVED OVERHEAD STEAM TRAVELING CRANE. We show in Fig. 1 a general view, and in Figs. 2 and 3 a side elevation and plan of an overhead steam traveling crane, which has been constructed by Mr. Thomas Smith, of Rodley, near Leeds, for use in a steel works, to lift, lower, and travel with loads up to 15 tons. For our engravings and description we are indebted to _Industries._ The crane is designed for hoisting and lowering while traveling transversely or longitudinally, and all the movements are readily controlled from the cage, which is placed at one end of and underneath the transverse beams, and from which the load can be readily seen. All the gear wheels are of steel and have double helical teeth; the shafts are also of steel, and the principal bearings are adjustable and bushed with hard gun metal. This crane has a separate pair of engines for each motion, which are supplied with steam by the multitubular boiler placed in the cage as shown. The hoisting motions consist of double purchase gearing, with grooved drum, treble best iron chain with block and hook, driven by one pair of 8 in. by 12 in. engines. The transverse traveling motion consists of gearing, chain, and carriage on four tram wheels, with grooved chain pulleys, driven by the second pair of 6 in. by 10 in. engines, and the longitudinal traveling motion driven by the other pair of 8 in. by 12 in. engines. The transverse beams are wrought iron riveted box girders, firmly secured to the end carriages, which are mounted on four double flanged steel-tired wheels, set to suit a 38 foot span. [Illustration: IMPROVED OVERHEAD TRAVELING CRANE] [Illustration: FIG. 2 SIDE ELEVATION] [Illustration: FIG. 3 PLAN] * * * * * BEST DIAMETER CAR WHEELS.[1] [Footnote 1: By Samuel Porcher, assistant engineer motive power department, Pennsylvania Railroad. Read at a regular meeting of the New York Railroad Club, Feb. 19, 1891.] It goes almost without saying that for any given service we want the best car wheel, and in general it is evident that this is the one best adapted to the efficient, safe and prompt movement of trains, to the necessary limitations improved by details of construction, and also the one most economical in maintenance and manufacture.