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Title: Stephen Hales' experiment to demonstrate circulation in plants.
Caption: Engraving depicting Stephen Hales' experiment to demonstrate circulation in plants. Hales placed the stem of a vine in a long tube and observed that liquid rose 44 feet. Stephen Hales (1677-1761) an English clergyman, botanist, chemist and physiologist. Dated 19th century.
Credit: Album / Universal Images Group / Universal History Archive \ UIG
Image size: 3597 × 5830 px | 60.0 MB
Print size: 30.5 × 49.4 cm | 1416.1 × 2295.3 in (300 dpi)