Welding welding was invented in 1893, and around that time another process, oxyfuel welding, became well established. Acetylene was discovered in 1836 by Edmund Davy, but its use was not practical in welding until about 1900, when a suitable torch was developed. At first, oxyfuel welding was one of the more popular welding methods due to its portability and relatively low cost. As the 20th century progressed, however, it fell out of favor for industrial applications. It was largely replaced with arc welding, as advances in metal coverings (known as flux) were made. Flux covering the electrode primarily shields the base
1836 Komarov 1836 Komarov 1836 Komarov, provisional designation , is a carbonaceous Dorian asteroid from the central region of the asteroid belt, approximately 22 kilometers in diameter. It was discovered on 26 July 1971, by Russian astronomer Nikolai Chernykh at Crimean Astrophysical Observatory in Nauchnij on the Crimean peninsula. The asteroid was named after Soviet cosmonaut Vladimir Komarov. "Komarov" is a member of the Dora family (), a well-established central asteroid family of more than 1,200 carbonaceous asteroids. The family's namesake is 668 Dora. It is alternatively known as the "Zhongolovich family", named after its presumably largest member 1734 Zhongolovich. The Dora