John Dalton portrait, color vector illustration
john dalton, chemist, physics, chemistry, atomic theory, atoms, elements, matter, molecules, gases, gas laws, pressure, temperature, volume, scientific, research, experiment, measurement, observation, calculation, composition, substances, particles, structure, model, theory, discovery, education, teaching, laboratory, science history, britain, nineteenth century, meteorology, color blindness, vision, academic, scholar, analysis, principles