The strange and beautiful machine shown above is a reconstruction of a mechanical calculator built by mathematician and inventor Thomas Fowler in the 1830s. The orignal machine has long since been lost, and precious few clues to its design and construction exist. Painstaking research by Pamela Vass and David Hogan eventually pieced together enough information to allow them to start building their own machine, aided by Mark Glusker. Together this team were able to construct the first working model of Fowler’s ternary calculating machine in over 150 years.
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