Ecclesiology – study of church affairs Eccrinology – study of excretion Ecology – study of environment Economics – study of material wealth Edaphology – study of soils Egyptology – study of ancient Egypt Ekistics – study of human settlement Electrochemistry – study of relations between electricity and chemicals Electrology – study of electricity Electrostatics – study of static electricity Embryology – study of embryos Emetology – study of vomiting Emmenology – study of menstruation Endemiology – study of local diseases Endocrinology – study of glands Enigmatology – study of enigmas Entomology – study of insects Entozoology – study of parasites that live inside larger organisms Enzymology – study of enzymes Ephebiatrics – branch of medicine dealing with adolescence Epidemiology – study of diseases; epidemics Epileptology – study of epilepsy Epistemology – study of grounds of knowledge Eremology – study of deserts Ergology – study of effects of work on humans Ergonomics – study of people at work Escapology – study of freeing oneself from constraints Eschatology – study of death; final matters Ethnogeny – study of origins of races or ethnic groups Ethnology – study of cultures Ethnomethodology – study of everyday communication Ethnomusicology – study of comparative musical systems Ethology – study of natural or biological character Ethonomics – study of economic and ethical principles of a society Etiology – science of causes; especially of disease Etymology – study of origins of words Euthenics – science concerned with improving living conditions Exobiology – study of extraterrestrial life