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