The first volume is an important contribution to general teratology, including a good history of the topic, and enunciating Schwalbe’s “teratogenic termination period”, the guiding principle for estimating the timing of teratogenic events. Volume 2 (1907) covers diploteratology. Volume 3 on individual malformations appeared in 3 parts between 1909 and 1937. Posthumous volumes were edited by Georg B. Gruber beginning in 1927. Vol. 3: Supplement, edited by G. Gruber in 1960.