Most of that bottom line is a list of what drugs he ingested while painting the portrait. Displaying this list was a common practice for Witkacy.
Along with being an artist, he was also a philosopher, author, playwright, poet, and photographer.
He wrote a text in the 1930s relating his experiences with peyote (mescaline) and other drugs; this book foreshadowed works like Aldous Huxley’s The Doors of Perception (1954). (http://gayforvangogh.tumblr.com/post/143204675556/dappledwithshadow-portrait-of-maria-nawrocka)