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The M1841 mountain howitzer was a mountain gun used by the United States Army during the mid-nineteenth century, from 1837 to about 1870. It saw service during the Mexican–American War of 1847–1848, the American Indian Wars, and during the American Civil War, 1861–1865 (primarily in the more rugged western theaters).
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.
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.
Wrought iron is a form of commercial iron containing less than 0.10% of carbon, less than 0.25% of impurities total of sulfur, phosphorus, silicon and manganese, and less than 2% slag by weight. [18] [19] Wrought iron is redshort or hot short if it contains sulfur in excess quantity. It has sufficient tenacity when cold, but cracks when bent or ...
The large number of horses posed a logistical challenge for the artillery, because they had to be fed, maintained, and replaced when worn out or injured. Artillery horses were generally selected second from the pool of high quality animals; cavalry mounts were the best horses. The life expectancy of an artillery horse was under eight months.
Breeching on wheelers, attached to their collars, which are attached in turn to the vehicle pole. When a horse, mule, or other animal is in harness, harness breeching (also known as full breeching) helps the animal to slow or control the forward movement of a vehicle. Animal-drawn vehicles have either a pair of shafts or a single pole ...
The J. L. Mott Iron Works was established by Jordan L. Mott in New York City in the area now called Mott Haven in 1828. [2] Mott was previously a grocer but he transitioned to iron works when he invented the first cast iron stoves that could burn anthracite coal. [ 1 ]
The earliest tracks consisted of wooden rails on transverse wooden sleepers, which helped maintain the spacing of the rails. Various developments followed, with cast iron plates laid on top of the wooden rails and later wrought iron plates or wrought iron angle plates (angle iron as L-shaped plate rails). Rails were also individually fixed to ...
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