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.
In 1698, Thomas Savery, an English inventor, patented a device that allowed for the use of steam to pump water. The steam engine that he created was used to remove water from mines. This design was improved upon by English engineer Thomas Newcomen in 1712.he steam powered engine is the heart of the steam locomotive. In order to understand how the locomotive works, it is important to first understand how the steam engine operates. This involves water and fire, which is used to create heat.