IN acceding to the editor's request to contribute an article to NATURE upon this instrument, I should like at the outset to express the feeling of curiosity with which any one, familiar with the many ...
About this time 130 years ago, Dorr Felt, of Chicago, invented the Comptometer. I learned that while looking up something else. A major method of learning interesting things is to look up something ...
This full-keyboard non-printing adding machine represents the successful adoption of mechanical aids to computation by American scientists. It was one of several computing devices owned by the ...
IIIF provides researchers rich metadata and media viewing options for comparison of works across cultural heritage collections. Visit the IIIF page to learn more. The titles Include Ropp's New ...
Q: I was wondering what happened to the Allentown Comptometer School that was directly across from Hess’s Department Store? I don’t even know what a Comptometer was, but I remember the school. A: The ...
HOLLAND — With the sun shining and the temperatures in the mid-60s, it felt like a perfect afternoon for the Felt Mansion Estate, 6597 138th Ave., in Holland. The drive through the countryside on a ...
If you build a specialized type of hardware which, by design, rarely arouses emotions of physical desire in the general populace, you can see how you might have a bit of a challenge promoting your ...
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