An Ingenious Marble Adding Machine

From time to time, I would find something truly remarkable on the web and the following is a good example:

Matthias Wandel was able to contruct a wooden adding machine that adds binary numbers. However, the most curious thing about it is that it is operated by marbles. Just watch the video to see its mechanism. Even those of you who are not fond of mathematics can appreciate this.


Binary Marble Adding Machine

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My name Edmark M. Law. I work as a freelance writer, mainly writing about science and mathematics. I am an ardent hobbyist. I like to read, solve puzzles, play chess, make origami and play basketball. In addition, I dabble in magic, particularly card magic and other sleight-of-hand type magic. I live in Hong Kong. You can find me on Twitter` and Facebook. My email is

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