The only Engine in the market attached to boiler having cold bearings. F. F. & A. B. Landis, Lancaster, Pa. The Turbine Wheel made by Risdon & Co., Mt. Holly, N. J., gave the best results at Centennial tests. Hand Fire Engines, Lift and Force Pumps for fire and all other purposes. Address Rumsey & Co., Seneca Falls, N. Y., U. S. A. For Shafts, Pulleys, or Hangers, call and see stock kept at 79 Liberty St. Wm. Sellers & Co. Wm. Sellers & Co., Phila., have introduced a new Injector, worked by a single motion of a lever. * * * * * =NEW BOOKS AND PUBLICATIONS.= METALS AND THEIR CHIEF INDUSTRIAL APPLICATIONS. By Charles R. Alder Wright. London: Macmillan & Co. 12mo; pp. 191. Price $1.25. In this neat little volume we have the substance of a course of lectures delivered at the Royal Institution of Great Britain in 1877, with thirty or more engraved illustrations of various metallurgical operations. The author discusses briefly, yet with sufficient fullness for popular purposes, the principal processes for reducing metals from their ores, the natural sources of metals, the metallurgy of the different metals, the physical properties of metals, and their thermic, electric, and chemical relations. The style is simple and the matter well chosen. DOSIA. A Russian Story. Translated from the French of Henry Greville, by Mary Neal Sherwood. Boston: Estes & Lauriat. Price $1.50. This is the seventh of the Cobweb Series of choice fiction, a bright, wholesome but rather thin story, as befits its associations. Novel readers will find it an amusing companion for a rainy day in the country, or for beguiling the tedium of a summer journey. * * * * * [Illustration: Notes & Queries] (1) H. P. says: Please inform me of some recipe for removing superfluous hair. A. Make a strong solution of sulphuret of barium into a paste with powdered starch. Apply immediately after being mixed and allow to remain for ten or fifteen minutes. See also p. 107 (8), vol. 38, and p. 25, current volume. (2) M. A. C. writes: I would like to know how to dissolve bleached shellac, to make it a cement for stone. A. Dissolve it by digestion in 3 or 4 parts of strong alcohol, or by the aid of ¼ its weight of borax in about 4 volumes of boiling water. (3) A. K. asks: 1. In rating substances as to hardness, diamond being No. 10, how do aluminum, osmium, iridium and steel as used in steel pens, number, also common and tempered glass? A. Aluminum about 3, iridosmine 6.5 to 7, steel 5.5 to 6, glass 5 to 5.5. 2. Can glass 1/32 inch in thickness be ground to angles of 15 per cent or less, and points as fine as pins, without difficulty, and how? A. No.