/ painting-planet . com == https : // painting-planet . com/portrait-of-molchanova-e-and-by-dmitry-levitsky/ == all the other pictures of this have the anthlia practically darkened out. I think I can fair use use this like this: Portrait of Molchanova E. And by Dmitry Levitsky (1735-1822)
The portrait  belongs to the series of portraits of Smolyanok – pupils of the Smolny Institute of noble maidens, written by the artist commissioned by the emperors Catherine II. Molchanova is depicted in a white silk dress, set for older pupils of the Educational Society of Noble Maidens. On the right on the table is an anthlia – a vacuum pump used as a training aid for Smolyanok.
Ekaterina Ivanovna Molchanova. The daughter of a collegiate adviser, a member of the university council, Ivan Yakovlevich Molchanov, a pupil of the wife of Ober-Jagermeister M. Ya. Naryshkina, who assigned her to the Smolny Institute.In 1766 she graduated from the course with a large gold medal and cipher of Catherine II, becoming the Grand-Maid of Honor of the Grand Duchess Maria Feodorovna, in the late 1770s – Catherine II. From 1780 she was married to S. A. Olsufiev, later Major General.
en . wikipedia . org/wiki/Smolny_Institute
mickhartley . typepad . com /blog/2013/11/the-smolny-institute-for-young-maidens.html
/web . archive . org/web/20080220191838/ http ://www . newcomen . com/excerpts/vacuum_cleaner/index . htm
https : //en . wikipedia . org/wiki/Vacuum_pump
https ://en . wikipedia . org/wiki/Vacuum_sewer