Creator
- Morfit, Clarence8
- Morfit, Henry Mason, 1793-186512
- Morris, Benjamin Wistar, 1819-19061
- Muckle, Alex4
- Muir, W. E.1
- Murphy, Vaughan1
- Nolan, Edward J.1
- O.J. Sheridan & Co.2
- Outerbridge, Alexander E.1
- Peck, John H.1
- Pennsylvania College. Phrenakosmian Society1
- Peterson, Lewis3
- Peterson, Peter1
- Pettit, G. M.2
- Philadelphia Board of Trade1
- Phillips, Professor1
- Piper, Jason1
- Platt & Brother1
- Poggendorff, J. C. (Johann Christian), 1796-18771
- Pollock, James, 1810-18902