Sprenger
JACOB, of the Order of Preachers, and Professor of Theology in Cologne, and HENRICUS INSTITOR (Latinized form of Krämer), two names of enduring infamy as the authors of the famous "Malleus Maleficarum" or "Hexenhammer" (1489), which first formulated in detail the doctrine of witchcraft , and formed a text-book of procedure for witch trials. They were appointed inquisitors under the bull "Summis desiapplications used in the electrical sys- derantes affectibus" of Innocent VIII. in tems of railways. During the World 1484, and their work is arranged in three War he was engaged in the development parts "Things that pertain to Witchof fuses in air and depth bombs. Hera craft"; "The Effects of Witchcraft"; was a member and official of many scientific societies and was awarded many prizes and medals for his inventions.
He was the author of many scientific papers on electricity.