The electro-magnetic telegraph : A defence against the injurious deductions drawn from the deposition of Prof. Joseph Henry /
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| Format: | Book |
| Language: | English |
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| Item Description: | Microfilm. Ann Arbor, Mich., University Microfilms [n.d.] (American culture series, Reel 389.7) Microform. |
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| Physical Description: | vii, 111 pages |