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Town seal (matrix) of Náchod (now in the Czech Republic) from 1570 Present-day impression of a Late Bronze Age seal. A seal is a device for making an impression in wax, clay, paper, or some other medium, including an embossment on paper, and is also the impression thus made.
William Dittmar FRS FRSE LLD (1833 – 1892) was a German-born scientist renowned as a chemical analyst. He was based largely in Scotland. He did much analytical work on the findings from the Challenger expedition.
A passport stamp is an inked impression in a passport typically made by rubber stamp upon entering or exiting a territory.. Passport stamps may occasionally take the form of sticker stamps, such as entry stamps from Japan, South Korea, and Sri Lanka.
The Four Horsemen c. 1496–98 by Albrecht Dürer, depicting the Four Horsemen of the Apocalypse. Woodcut is a relief printing technique in printmaking.An artist carves an image into the surface of a block of wood—typically with gouges—leaving the printing parts level with the surface while removing the non-printing parts.
A Scott Russell linkage is a linkage which translates linear motion through a right angle.. The linkage is named after John Scott Russell (1808–1882), although watchmaker William Freemantle had already patented it in 1803.