The improvement that I sometime since perfected for lessening the friction on rails, cars, and engines, for which a patent has been obtained ....
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| Format: | Online Book |
| Language: | English |
| Published: |
s.n.,
1840
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| Online Access: | http://ezproxy.villanova.edu/login?URL=http://galenet.galegroup.com/servlet/MOME?af=RN&ae=U108691576&srchtp=a&ste=14&q=vill_main |
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| Physical Description: | [3] p. : ill. ; 29 cm. |
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