Joule's original calorimeter ('paddle-wheel apparatus') used in determining the mechanical equivalent of heat. Copper mixing vessel with vane and spindle Mechanical equivalent of heat apparatus 1876
Lid for insulated barrel, part of Joule's original calorimeter ('paddle-wheel apparatus') used in determining the mechanical equivalent of heat. Copper mixing vessel with vane and spindle Lid for Insulated Barrel 1876
Insulated barrel, part of Joule's original calorimeter ('paddle-wheel apparatus') used in determining the mechanical equivalent of heat. Copper mixing vessel with vane and spindle Insulated Barrel 1876
Joule's original calorimeter ('paddle-wheel apparatus') used in determining the mechanical equivalent of heat. Copper mixing vessel with vane and spindle Paddle-wheel Apparatus 1876