An american engineer born February 14, 1859 observed a wheel as a student located where?
Burden Iron Works The Burden Iron Works was an iron works and industrial complex on the Hudson River and Wynantskill Creek in Troy, New York. It once housed the Burden Water Wheel, the most powerful vertical water wheel in history. It is widely believed that George Washington Gale Ferris Jr., inventor of the Ferris wheel, had occasion to observe the wheel while a student at Rensselaer Polytechnic Institute. The iron works site was listed on the National Register of Historic Places as an archaeological site in 1977. The Burden Ironworks Office Building was previously listed in 1972.
Pinwheel calculator A Pinwheel calculator was a class of mechanical calculator popular in the 19th and 20th century using, for its calculating engine, a set of wheels that had an adjustable number of teeth. These wheels, also called pinwheels, could be set by using a side lever which could expose anywhere from 0 to 9 teeth, and therefore when coupled to a counter they could, at each rotation, add a number from 0 to 9 to the result. By linking these wheels with carry mechanisms a new kind of calculator engine was invented. Turn the wheels one way and one performs an addition, the other way a subtraction. As part of a redesign of the arithmometer, they reduced by an order of magnitude the cost and the size of a mechanical calculators on which one could easily do the four basic operations (add, subtract, multiply and divide).