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Jacques Balmat carrying an axe and an alpenstock An 1872 diagram of an early ice axe, showing how the alpenstock was modified by the addition of a pick and an adze. An alpenstock (German: Alpen-"alpine" + Stock "stick, staff") is a long wooden pole with an iron spike tip, used by shepherds for travel on snowfields and glaciers in the Alps since the Middle Ages.
Typically the pole rails were logs of 8 to 12 inches (20 to 30 cm) diameter, laid parallel directly on the ground without cross-ties, and joined end-to-end with lap joints and wooden pegs. Rolling stock typically had wheels either with concave rims that hugged the top of the pole rails, or un-flanged wheels with separate guide wheels running ...
The Confederates were unable to manufacture the wrought iron barrels for the 3" rifle, thus captured ones were prized items. Despite the effectiveness of this weapon, the Confederacy did produce various bronze 3" rifles and cast iron pieces with a straight tube; however, none of them were reliable and the latter were often prone to bursting at ...
Wrought iron is an iron alloy with a very low carbon content (less than 0.05%) in contrast to that of cast iron (2.1% to 4.5%). It is a semi-fused mass of iron with fibrous slag inclusions (up to 2% by weight), which give it a wood-like "grain" that is visible when it is etched, rusted, or bent to failure.
A breech-loading swivel gun, called a "Pierrier à boîte" in French, in wrought iron, 1410. Length: 72 cm, caliber: 38 mm, weight: 41.190 kg. Length: 72 cm, caliber: 38 mm, weight: 41.190 kg. A breech-loading swivel gun was a particular type of swivel gun and a small breech-loading cannon invented in the 14th century.
The bells are small-sized and located on wearable "Conestoga bell arches", sturdy iron pieces measuring 16 in (400 mm) to 20 in (500 mm). The lead horses (or front horses) often had five small bells, the middle horses four, and the pole horses (back horses) three larger ones for a total of twenty-four bells on the entire team.
At the ends the verticals are four 2-inch (51 mm) rods. Rods 7 ⁄ 8 of an inch wide (21.2 mm) form the diagonals, double in each panel, [4] bracing the bridge against wind. [2] Latitudinal and longitudinal I-beams supported by the bottom chords provide a deck frame. They are trussed with two 7 ⁄ 8-inch wrought
Luristan bronze objects came to the notice of the world art market from the late 1920s and were excavated in considerable quantities by local people, "wild tribesmen who did not encourage the competition of qualified excavators", [10] and taken through networks of dealers, latterly illegally, to Europe or America, without information about the contexts in which they were found. [11]
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