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Scientific American, Vol. 26, No. 17 (1872) (1872)
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ip some paragraphs, which explain | in each block. These iron posts reach up to the second story, the Scientific American Patent Agency, October 10,1871. He | the principal features. and upon their tops are fastened the rails for the sidewalk to feels very confident that,in this invention, he has… … represent details, who desire, can go up to that second Hi gp umd i Ht it nul SPEER’S ENDLESS TRAVELING OR RAILWAY SIDEWALK, © 1872 SCIENTIFIC AMERICAN, INCInternet Archive · Public domain (published before 1931). Free to use for anything.
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