Encyclopedia article compares the development and working of the standard, fuel-burning automobile engine to that of the diesel engine.
Learn about this type of aircraft invented during the 1920s that works by means of a large rotor built atop the fuselage.
Read about the history of ballooning, from the first manned flights to modern-day attempts to circumnavigate the globe.
Find out how the first steam engines and boilers were invented and how they were developed over time in Britain and the United States.
Find out how the picture tubes in TV sets work to create an image on the screen from this encyclopedia article about the cathode ray tube.
Encyclopedia article details the way cellular telephones work and how they have developed.
Find out how compressed air was first used to power machines and how it is used today in jackhammers and certain wrenches.
Article devoted to this method of mechanical transportation briefly describes pneumatic conveyors, chutes, and roller conveyors.
Detailed article describes how and why dams are built. Read about spillways and outlets, or get a dam history.
Find out from this encyclopedia article how DC and AC electric motors work and how the first electric motor was developed by Faraday.
Find out exactly what an electrode is and what role it plays in the dry cell battery from this encyclopedia overview.
Learn about this device that helps to remove impurities from gasses through the use of electric current and electrodes.
Find out how fax machines work to transmit documents around the world from this encyclopedia article detailing their use.
Find out how these large, gas-driven engines work to provide the energy for ships and trains from this encyclopedia resource.
Learn from this encyclopedia article how spur, internal and helical gears differ from each other and how all gears work.
Find out how yokes, breast harnesses, non-choking harnesses, and reins developed over history allowing humanity to use animals for transport.
Overview of these aircraft provides a history of their development, an explanation of how they work and a summary of how they are used.
Encyclopedia article describes the advent of gas and then electric lamps over the course of history. Find out about wick shapes.
Read this encyclopedia article about the revolving tool that has made manufacturing possible since the Middle Ages.
Offers a detailed history of the development of the locomotive, including the steam-powered, electric, and diesel-electric engines.
Read about the lever, pulley, wheel, axle, and the inclined plan. Find out how machines work from the encyclopedia article.
Find out how microphones work, including the crystal microphone and the one invented by Alexander Graham Bell.
Read a brief encyclopedia introduction to the music box. Find out when they were invented and how they work.
Take a look at this encyclopedia article which explains how vacuum tubes are constructed and how they work.
Find a brief history of this Mesopotamian invention that changed the world from this encyclopedia article.
Brief encyclopedia article describes what a wheel and axle is, how it is constructed, and how it is used.
Article explains what windmills are, how they work, and how they have developed over time. Find out about wind turbine generators as well.
Read about this invention by Becky Lippmann of a LEGO robot that can play a toy xylophone.