1 teaspoon vanilla extract. 1 large egg. Lightly grease a doughnut (or muffin) tin and preheat the oven to 350F. Sift the flour, cocoa powder, baking powder and baking soda, and then whisk in the sugar, nutmeg and salt.
steam engine. An engine in which the energy of hot steam is converted into mechanical power, especially an engine in which the force of expanding steam is used to drive one or more pistons. The source of the steam is typically external to the part of the machine that converts the steam energy into mechanical energy.
Thomas Newcomen and a Steam Engine to Remove Water from Mines. Thomas Newcomen (1663 - 1729) is a third candidate for recognition as 'the one who invented the steam engine .' He built the first atmospheric steam engine as an improvement over Savery's device for removing water from coal mines. Newcomen's steam engine is shown in the illustration at the left.