Names
- Mitchill, Samuel Latham, 1764-1831.1
- Moore, Henry, Sir, 1713-1769.1
- Mount Washington Cog Railway.1
- Murray, James, 1719?-1794.2
- Muscovy Company.1
- New York Elevated Railway Company.1
- Newcastle, Henry Fiennes Pelham-Clinton, Duke of, 1720-1794.1
- Newcastle, Thomas Pelham-Clinton, Duke of, 1752-1795.2
- North, Frederick, Lord, 1732-1792.3
- Northern Pacific Railway Company.1
- Northumberland, Hugh Percy, Duke of, 1742-1817.1
- O'Hara, Charles, ca. 1740-1802.1
- O'Reilly, Alejandro, 1725-1794.1
- Ohio Company (1747-1779)1
- Oklahoma Land and Colonization Co.1
- Oswald, Richard, 1705-1784.2
- Otis, James, 1725-1783.1
- Panama-Pacific International Exposition (1915 : San Francisco, Calif.)1
- Parker, Daniel, 1782-1846.1
- Parker, Peter Buell.1