STRONG AND CHEAP SPAR BRIDGES. General description, dimensions, and particulars, with 2 pages of drawings, covering illustrations of all the details, for a bridge of 100 feet span or less; specially useful for crossing of creeks, small rivers, gullies, or wherever a costly structure is not desirable. The drawings are from the Spar Bridge exhibited at the Centennial, in the U. S. Department of Military Engineering. These bridges are wholly composed of undressed stuff. Supplement 71. Price 10 cents.
FIREPROOF DWELLINGS OF CHEAP CONSTRUCTION. A valuable and important paper, containing Plans and Descriptions of Model Fireproof Dwellings of cheap construction lately erected in Chicago. By A. J. Smith, Architect. With 9 illustrations. Plan No. 1 exhibits the construction of comfortable one-story, 16 ft. front dwellings, of brick and concrete, finished complete at a cost of $1,200. Plan No. 2 exhibits the construction of a comfortable 23 ft. front, two-story dwelling, of brick and concrete, finished complete, with cellar, for $1,700. Several of these dwellings, on both plans, have been built at the prices stated. This valuable paper also contains the Report of the City Authorities of Chicago, certifying to the fireproof nature of these buildings, with other useful particulars. Contained in Scientific American Supplement No. 91. Price 10 cts. To be had at this office and of all newsdealers.
OUTWARD MARKS OF A GOOD COW. By Capt. John C. Morris, Pa. Carelessness in Breeding. How to Select for Breeding. Marks of the Handsome Cow. Care and Training of the Heifer. Infallible Marks of Good Milkers. Distinguishing Marks and Characteristics of the "Bastard" and the "Bogus" Cow, etc. Contained, with useful Remarks on Bee Culture, in Scientific American Supplement No. 135. Price 10 cents. To be had at this office and of all newsdealers.
ON CHRONIC MALARIAL POISONING. By Alfred L. Loomis, M.D. A Highly Instructive Clinical Lecture, delivered at the University Medical College, N. Y Contained in Scientific American Supplement No. 102. Price 10 cents. To be had at this office and of all newsdealers.
ICE-HOUSE AND COLD ROOM. —BY R. G. Hatfleld. With directions for construction. Four engravings. Supplement No. 59. Price, 10 cents.