Paedology – study of children Paedotrophy – art of rearing children Paidonosology – study of children's diseases; pediatrics Palaeoanthropology – study of early humans Palaeobiology – study of fossil plants and animals Palaeoclimatology – study of ancient climates Palaeolimnology – study of ancient fish Palaeolimnology – study of ancient lakes Palaeontology – study of fossils Palaeopedology – study of early soils Paleobotany – study of ancient plants Paleo-osteology – study of ancient bones Palynology – study of pollen Papyrology – study of paper Parapsychology – study of unexplained mental phenomena Parasitology – study of parasites Paroemiology – study of proverbs Parthenology – study of virgins Pataphysics – science of imaginary solutions Pathology – study of disease Patrology – study of early Christianity Pedagogics – study of teaching Pedology – study of soils Pelology – study of mud Penology – study of crime and punishment Periodontics – study of gums Peristerophily – pigeon-collecting Pestology – science of pests Petrology – study of rocks Pharmacognosy – study of drugs of animal and plant origin Pharmacology – study of drugs Pharology – study of lighthouses Pharyngology – study of the throat Phenology – study of organisms as affected by climate Phenomenology – study of phenomena Philately – study of postage stamps Philematology – act or study of kissing Phillumeny – collecting of matchbox labels Philology – study of ancient texts; historical linguistics Philosophy – science of knowledge or wisdom Phoniatrics – study and correction of speech defects Phonology – study of speech sounds Photobiology – study of effects of light on organisms Phraseology – study of phrases Phrenology – study of bumps on the head Phycology – study of algae and seaweeds Physics – study of properties of matter and energy Physiology – study of processes of life Phytology – study of plants; botany Piscatology – study of fishes Pisteology – science or study of faith Planetology – study of planets Plutology – political economy; study of wealth Pneumatics – study of mechanics of gases Podiatry – study and treatment of disorders of the foot; chiropody Podology – study of the feet Polemology – study of war Pomology – study of fruit-growing Posology – science of quantity or dosage Potamology – study of rivers Praxeology – study of practical or efficient activity; science of efficient action Primatology – study of primates Proctology – study of rectum Prosody – study of versification Protistology – study of protists Proxemics – study of man’s need for personal space Psalligraphy – art of paper-cutting to make pictures Psephology – study of election results and voting trends Pseudology – art or science of lying Pseudoptics – study of optical illusions Psychobiology – study of biology of the mind Psychogenetics – study of internal or mental states Psychognosy – study of mentality, personality or character Psychology – study of mind Psychopathology – study of mental illness Psychophysics – study of link between mental and physical processes Pteridology – study of ferns Pterylology – study of distribution of feathers on birds Pyretology – study of fevers Pyrgology – study of towers Pyroballogy – study of artillery Pyrography – study of woodburning