. Scientific American Volume 97 Number 16 (October 1907) . gtramping outfits, sleeping bags and tents; also such other shelters as treenouses, straw huts, log cabins and caves. The winter diversions include instructions for makingsix kinds of skatesails and eight kinds of snow shoes and skis, besides ice boats, scooters,sledges, toboggans and a peculiar Swedish contrivance called a rennwolf. Among the more instructive subjects covered are surveying wigwaggingheliographing and bridge building, in which six different kinds o? bridges,including a simple cantilever bridge, are described. In additi
. Scientific American Volume 97 Number 16 (October 1907) . gtramping outfits, sleeping bags and tents; also such other shelters as treenouses, straw huts, log cabins and caves. The winter diversions include instructions for makingsix kinds of skatesails and eight kinds of snow shoes and skis, besides ice boats, scooters,sledges, toboggans and a peculiar Swedish contrivance called a rennwolf. Among the more instructive subjects covered are surveying wigwaggingheliographing and bridge building, in which six different kinds o? bridges,including a simple cantilever bridge, are described. In addition to these, the book contains a larger number of miscellaneousdevices, such as scows, canoes, land yachts, windmills, water wheels andthe like. A complete table of contents sent on request. TO OUR SUBSCRIBFRS y<«-name Is at present upon our i,st as asubscriber vr,JIV ^^U^MDCKO for SCIENTIFIC AnERICAN write to us and we will letyou know our plan whereby you may obtain all the above books absolutely FREE MUNN & COMPANY. 361 Broadway. New York City. ) 1907 SCIENTIFIC AMERICAN, INC. October 19, 1907. Scientific American 283 Manufacturers! Investigate ^Portsmouth, Virginia^ Portsmouth offers unequalled advantages for theprofitable operation of almost any manufacturingindustry. It is the natural gateway between theresources and markets of the Korth and South, draw-ing from and catering alike to both. Cheap fuel atthe very door, an abundance of reliable labor andan inexhaustible supply of raw material. Sine linesof railway and a score of lines of water transpor-tation assure exceptionally low freight rates. Adelightfully even climate, pure water,good schools,good health and beautiful homes. Splendid factory sites and business opportunities are now available. Valuable assistance will be given investigators. Full particulars on request. Address I. T. VAN PATTEN, Secretary. Portsmouth, Virginia.
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