Jabir ibn Hayyan 4 (An Islamic Scientist)

His works in the science of chemistry are as important as those of eighteenth century scientists like Priestly and Lavoisier. He is credited for the discovery of nineteen different substances which we call element in modern chemistry. He was the first person to introduce the experimental method in chemistry. Jabir perfected the use of various chemical processes used in the modern chemistry laboratory, such as distillation, crystallization and sublimation etc. Using some of those methods he produced concentrated acetic acid from vinegar. He synthesized hydrochloric acid by heating salt and sulfuric acid and nitric acid by heating saltpeter with sulfuric acid.