Slide showing a table listing 'the relative viability of the strains of Drosophila funebris of different geographical origin (from Timofeeff-Ressovsky)'. Slide shows table 14: 'the relative viability of the strains of Drosophila funebris of different geographical origin (from Timofeeff-Ressovsky)'. Row headings: 'strains of d. funebris', 'viability in % of that of drosophila melanogaster' (subdivided into 15o, 22o and 29o) and 'viability in % of that of the Berlin strain of d. funebris' (subdivided into the same categories). Column headings: 'strains of d. funebris': Berlin, Sweden, Norway, Denmark, Scotland, England, France, Portugal, Spain, Italy, Gallipoli, Tripoli, Egypt, Leningrad, Kiev, Moscow, Saratov, Perm, Tomsk, Crimea, Caucasus I, Caucasus II, Turkestan and Semirechje. Late 19th to early 20th century