RECORDS of the life of Basilius Valentinus, the Benedictine monk who for his achievements in the chemical sphere has been given the title of Father of Modern Chemistry, are a mass of conflicting evidence. Many and varied are the accounts of his life, and historians seem quite unable to agree as to his exact identity, or even as to the century in which he lived. It is generally believed, however, that 1394 was the year of his birth, and that he did actually join the Benedictine Brotherhood, eventually becoming Canon of the Priory of St. Peter at Erfurt, near Strasburg, although even these facts cannot be proved. Whatever his identity, Basil Valentine was undoubtedly a great chemist, and the originator of many chemical preparations of the first importance. Amongst these are the preparation of spirit of salt, or hydrochloric acid from marine salt and oil of vitriol (sulphuric acid) the extraction of copper from its pyrites (sulphur) by transforming it firstly into copper sulphate, and then plunging a bar of iron in the watery dissolution of this product:BASIL VALENTINE