Slide showing 'Representation of the results of Goldschmidt's investigation of crossing the gupsy moth Lymantria.' Slide shows 'Representation of the results of Goldschmidt's investigation of crossing the gupsy moth Lymantria.' The results are in the form of diagrams with labels. Title below image reads: ' Fig. 43 - Simplified representation of the results of Goldschmidt's investigation of crossing the gupsy moth Lymantria. The suffixes to M and F denote the 'strengths' of the male and female factors. When the sum of M is >F, the animal is male; when < F, a female; when = F, intersexual.' Late 19th to early 20th century