botanists

Looks like she also taught at Harvard, and as a visiting lecturer at Howard Payne College in Texas: texashistory.unt.edu/ark:/67531/metapth128368/m1/1/ She was married to a fellow academic, sociologist Pitirim Alexandrovitch Sorokin (1889-1968). They had two sons. Here's her husband's Wikipedia entry: en.wikipedia.org/wiki/Pitirim_Sorokin His papers are at the University of Saskatchewan: library2.usask.ca/sorokin/about His mentions of his family, in a memoir essay: "To finish this brief sketch of my life I must mention that in 1917, during the Revolution, I was happily married to Dr. Helen Baratynskaya, cytologist-researcher in her own right. She has published a number of her studies in botanical and other biological journals and is still continuing her research. For the forty-five years of our married life we seem to have had, as yet, neither time nor sufficient reason for divorce or separation. We have two sons: Dr. Peter P. Sorokin, research physicist with IBM, and Dr. Sergei P. Sorokin, instructor and research associate at Harvard Medical School." cliffstreet.org/index.php/external-course So this is one of her sons: en.wikipedia.org/wiki/Peter_P._Sorokin

Year of death for Clara H. Hasse has been updated from 1924 to 1926, in both the title and description field. Thank you!

The woman identified as Mary K. Berger is Mary K. Bryan. Also mislabeled here: siarchives.si.edu/blog/faces-crowd

Photo & caption up at en.wikipedia.org/wiki/Theodore_Dru_Alison_Cockerell Thanks for posting these!