. Scientific American Volume 92 Number 08 (February 1905) . All Problems Solved Practical—Accurate—Scientific 150 pages. Cross practical handbook for stu-dents, apprentices, and electricalengineers.—Scientific American. Silk Cloth, decorative cover, silver stamping, . $ Leather, marbled edges, gold stamping, . LAIRD & LEE,««, CHICAGO SENSITIVE LABORATORY BALANCE. By N. Monroe Hopkins. This built-up laboratorybalance will weigh up to one pound and will turn with aquarter of a postage stamp. The balance can be madeby any amateur skilled in the use of tools,
. Scientific American Volume 92 Number 08 (February 1905) . All Problems Solved Practical—Accurate—Scientific 150 pages. Cross practical handbook for stu-dents, apprentices, and electricalengineers.—Scientific American. Silk Cloth, decorative cover, silver stamping, . $ Leather, marbled edges, gold stamping, . LAIRD & LEE,««, CHICAGO SENSITIVE LABORATORY BALANCE. By N. Monroe Hopkins. This built-up laboratorybalance will weigh up to one pound and will turn with aquarter of a postage stamp. The balance can be madeby any amateur skilled in the use of tools, aud it willwork as well as a $125 balance. The article is accom-panied by detailed working drawings showing variousstages of the work. This article is contained in Scien-tific American Supplement, No. 11S4. Price 10cents For sale by Mtjnn & Co., 361 Broadway, NewYork City, or any bookseller or newsdealer. U. S. A. LIQUID PISTOL. Will stop the most vicious dog(or man) without perm a 11 cut In-jury, Pt-rfectly safe to carry withoutdanger of leakage. Fires and recharges by ,, pulling the trigger. Loads from any liquid. No cartridgesrtijuirwj. Over 10 shots in one loading. All dealers, or oymail, £>Oc. Rubber-covered holster fie. extra. PARKER, STEARNS & SUTTON, 226 South St., NewYork .» ALL THE WATER Ml WANT WITHOUT COST Other than the first price of a machine, NIAGARA HYDRAULIC RAM costs less than a windmill or an no fuel, attention or there is a running stream theNiagara will work automatically dayand jiisht. Forces water any height,„aay distance. Used by Gov-ernment, Railroads and Factories. Free Catalog. NIAGARA HYDRAULIC ENGINE CO. Chester, Pa. 140 Nassau St., New York
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Keywords: ., bookcentury1900, bookdecade1900, booksubject, booksubjectrailroad
