Slide showing a table demonstrating 'activities of biological stimulating substances'. Slide shows a table demonstrating 'activities of biological stimulating substances'. Title above table reads: 'Table 16 - activities of biological stimulating substances'. There are four columns. Column 1 is labelled 'Biological response reactions'. There are 6 items described in this column. Column 2 is labelled 'Investigators' and gives names of the researchers involved. There are two notes which refer to column 2. Note 1: 'The inductions with digitonin were always of the palisade type, and apparently not much more pronounced than those of controls in which egg-albumen is implanted'. Note 2 reads: 'The figures for Fischer's inductions were by a slip printed wrongly in the original table.' Column 3 is labelled 'Effects and agents', and column 4 is labelled 'Effective dose mgm./kg. wet wt.' Late 19th to early 20th century