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
Rafiqul Islam (scientist) Rafiqul Islam (scientist) Rafiqul Islam ( – 5 March 2018) was a Bangladeshi physician and medical scientist. He is known for the discovery of food saline (Orsaline) for the treatment of Diarrhea. The British Medical Journal The Lancet referred to its invention of saline as "the most important invention of medical science in the twentieth century". Islam was born in 1936 in the then British India's Bengal Presidency (now Bangladesh) in Chauddagram Upazila, Comilla. He passed MBBS from Dhaka Medical College and Hospital in 1965. Later, he received high education in Trinity Medicine and Hygiene in Trinity (UK). After passing