Marble adding machine

23rd June 2007 Reading Time: < 1 0 comments

Who needs electronic calculators or computers?

Nobody’s prefect. If you find any spelling mistakes or other errors in this post, please let me know by highlighting the text and pressing Ctrl+Enter.

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1 comment… Add yours

Yorkshire Pudding 2nd July 2007

What a useful invention! How did we survive without it?

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