Professors of the Moscow University, who resigned in protest against the arbitrariness of the authorities. In the photo, sit: Vladimir Serbsky, Kliment Timiryazev, Nikolay Umov, Peter Minakov, Alexander Manuilov, Mikhail Menzbier, Alexander Focht, Vasily Shervinsky, Witold Tseraski, Evgeny Trubetskoy; stand: Ivan Alexinsky, Vladimir Roth, Nikolay Zelinskiy, Pyotr Lebedev, Alexander Eikhenvald, Gabriel Shershenevich, Veniamin Khvostov, Alexander Alexeev,