This page links to a physically unremarkable Soviet slide rule used for calculating things like the volumetric flow rate in irrigation canals used in Uzbek SSR

This page links to a physically unremarkable Soviet slide rule used for calculating things like the volumetric flow rate in irrigation canals used in Uzbek SSR for growing cotton, their primary cash crop [1]. Unfortunately, there are no scales on it for "evaporation" and "shitty construction", or the Aral Sea[2] might still be there. [1] https://osgalleries.org/collectors/davis/info_and_image.cgi?string1=misc&string2=2151 https://osgalleries.org/collectors/davis/info_and_image.cgi?... [2] https://en.wikipedia.org/wiki/Aral_Sea https://en.wikipedia.org/wiki/Aral_Sea