Scientific apparatus, instruments and installations for heating and cooling in the nature of heat transfer, evaporation, condensation, boiling with reflux and for simple distillation and for azeotropic distillation, while removing a phase, namely, distillers for chemical processing; water distillation installations with mechanical, hydraulic or electric stirring motors not for scientific purposes and not vacuum distillation equipment; stirred laboratory autoclaves; distillation columns, disti...