This is an online edition of the classic technical reference Five Hundred and Seven Mechanical Movements by Henry T. Brown. This site contains the original illustrations and text from the 21st edition of the book, published in 1908. It also includes animated versions of the illustrations, and occasional notes by the webmaster.
Animated Engines host animated illustrations that explain the inner workings of a variety of steam, Stirling, and internal combustion engines.
Free books to read and enjoy online. General interest hypertext-books and technical hyper-textbooks — physics, mathematics, and more.
Radio broadcasts leave Earth at the speed of light and travel outwards into space. Follow them through the Milky Way as you scroll backwards through time and listen to what the stars hear.
PhET provides fun, free, interactive, research-based science and mathematics simulations. We extensively test and evaluate each simulation to ensure educational effectiveness. These tests include student interviews and observation of simulation use in classrooms.
We are a group of nuclear engineers hoping to help the world learn some interesting and important information about nuclear energy. We aim to enlighten the public about the capabilities of nuclear energy so that society may embrace it as an improvement in many aspects over current energy sources.
