Editorialsiege, Illustration of a siege from the 16th century, Fig. 1 & 2, according to S. XLIIIr, 1547, Walther Hermann Ryff: Der furnembsten, notwendigsten, der gantzen Architectur angeh?rigen mathematischen und mechanischen K?nst eygentlicher Bericht und [.....
EditorialFrom artificial geometric reticles and measurements, Geometric measurement from the 16th century, Fig. 3, p. XLv, 1547, Walther Hermann Ryff: Der furnembsten, notwendigsten, der gantzen Architectur angeh?rigen mathematischen und mechanischen K?nst eyge...
EditorialFire setting in the pit, Firewood is stacked in the pit and set on fire so that firmer rock can be heated and then more easily mined. Woodcut, p. 84, (Das f?nftft Buch), Manuel, Hand Rudolf (graveur sur bois), 1557, Gregorius Agricola: Vom Bergkwerck X...
EditorialRetraction - danger due to sulfur concentration, The miners pass through the shaft on ropes, ladders or on sprouts into the pit construction (retraction), with the fires the sulfur concentration is measured, woodcut, p. 178, (The sixth book), Manuel, H...
Editorialdewatering, A gear is driven by a coiler or an impeller., This moves another wheel on which a chain with larger metal bodies lies., The chain links thus conveyed water from the mine via a borehole, drainage, pp. 160-161, (The Sixth Book), Manuel, Hand ...
Editorialsiege, Illustration of a siege from the 16th century, Fig. 1 & 2, according to S. XLIIIr, 1547, Walther Hermann Ryff: Der furnembsten, notwendigsten, der gantzen Architectur angeh?rigen mathematischen und mechanischen K?nst eygentlicher Bericht und [.....