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.
Transportation History: The Steam Locomotive. Steam power is one of the most important and key aspects of the Industrial Revolution. The invention of the steam engine created many changes and additions to the technology of the time, including steam powered locomotives.Steam locomotives are vehicles that run on rails or tracks and are powered by steam engines.ransportation History: The Steam Locomotive. Steam power is one of the most important and key aspects of the Industrial Revolution. The invention of the steam engine created many changes and additions to the technology of the time, including steam powered locomotives.