ELECTRO-MAGNETIC TELEGRAPH- ASTRONOMICAL OBSERVATIONS. LETTER FROM THE SECRETARY OF THE TREASURY...
30th Cong., 2d Sess. HED21. 1849. 13pp, Disbound, some spotting. Good+. More
30th Cong., 2d Sess. HED21. 1849. 13pp, Disbound, some spotting. Good+. More