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＜電子ブック＞
The improvement that I sometime since perfected for lessening the friction on rails, cars, and engines, for which a patent has been obtained ....

出版者	[New York : s.n
出版年	184-?]
大きさ	[3] p. : ill. ; 29 cm
著者標目	*Smith, J. Elnathan
件　名	LCSH:Railroad tracks LCSH:Rubber industry and trade
一般注記	Title from first lines of text Advertisement, issued as a form letter Dated: New York, April 10th, 1849 and signed: J. Elnathan Smith, patentee Includes a testimonial letter, signed: John Hampson Reproduction of original from Kress Library of Business and Economics, Harvard University Goldsmiths'-Kress no. 31629.101 Electronic reproduction Farmington Hills, Mich. Thomson Gale 2005 Available via the World Wide Web Access limited to licensing agreements s2005 miunns HTTP:URL=http://reo.nii.ac.jp/hss/2000000000250052

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