JF Ptak Science Books Quick Post
The "Proportior" (sounding somewhat like an exclamation, like Excelsior!, and looking for all the world like it should be spelled some other more appropriate way) a fabulous desktop/tabletop calculator, as seen in the Science, October 4, 1889:
Thanks to Ray Girvan for the link to a successful download of images for this!
John, the scans aren't visible to non-US readers. However, the same article's available via JSTOR, at the Internet Archive: "The Proportior (October 4, 1889)" https://archive.org/details/jstor-1762818
Posted by: Ray Girvan | 21 July 2014 at 03:32 PM