Career
He was co-discoverer with Arno Arthur Wachmann of the periodic comets 29P/Schwassmann–Wachmann, 31P/Schwassmann–Wachmann and 73P/Schwassmann–Wachmann, and with Arno Arthur Wachmann and Leslie Peltier of the non-periodic comet C/1930 D1 (Peltier–Schwassmann–Wachmann). Arno Arthur Wachmann was accompanied on finding Comet Schwassmann Wachmann or 73P by Fredrick Carl Arnold Schwassmann.