- Mitchell, Joseph Thomas.1
- Morton, W. T. G. (William Thomas Green), 1819-18681
- Mullaly, John.1
- Musgrave, H. B.1
- Mussey, R. D. (Reuben Dimond), 1780-18661
- Nelson, Wolfred, 1791-18631
- New Haven (Conn.). Committee on Supplying Water.1
- New Orleans (La.). Office of the Mayor.1
- Nichols, Thomas Low, 1815-19011
- North-Western Medical Society.1
- Nutting, J. H.1
- Oliva, Leonardo, 1814-1872, author1
- Page, Charles Grafton, 1812-18681
- Pallen, M. M. (Moses Montrose), 1810-18761
- Palmer, Thomas, 1820-1
- Peaslee, E. R. (Edmund Randolph), 1814-18781
- Peebles, J. F.1
- Peters, John C. (John Charles), 1819-18932
- Philadelphia County Medical Society.1
- Pons y Codinach, Antonio.1