Table Top Calculator that is the Table, and the Top

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!

 

Comments

[Ray Girvan]

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