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Petersburg (Va.) 2
Petersburg Crater, Battle of, Va., 1864 1
Petersburg National Battlefield (Va.) 1
Petition, Right of 1
Petrarca, Francesco, 1304-1374 4
Petrified Forest National Park (Ariz.) 3
Petroleum 2
Petroleum engineering 1
Petroleum industry and trade 4
Petrology 2
Pets 36
Pettie, John, 1839-1893 1
Pettigrew, James Johnston, 1828-1863 1
Peyote 1
Peyton, Anne Montgomery, 1802-1850 1
Peyton, John Howe, 1778-1847 1
Pfeiffer, Ida, 1797-1858 1
Phaedra (Greek mythology) 1
Phallicism 9
Phalsbourg (France) 1
Phantom of the Opera (Fictitious character) 1
Pharaohs 1
Pharisee and the publican (Parable) 1
Pharisees 1
Pharmaceutical industry 3
Pharmacists 3
Pharmacology 3
Pharmacopoeias 1
Pharmacy 7
Pharsalus, Battle of, Farsala, Greece, 48 B.C. 1
Phase rule and equilibrium 1
Pheasants 1
Phenols 1
Philadelphia 17
Philadelphia (Pa.) 16
Philanthropists 9