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Title: John Canton's method of magnetising bars of steel.
Caption: A woodcut engraving depicting John Canton's method of magnetising bars of steel. John Canton (1718-1772) a British physicist. Dated 18th century.
Credit: Album / Universal Images Group / Universal History Archive/UIG
Image size: 6126 × 3423 px | 60.0 MB
Print size: 51.9 × 29.0 cm | 2411.8 × 1347.6 in (300 dpi)