When his analysis is complicated it is because the subject-matter is complicated.
To the public Boole was known only as the author of numerous abstruse papers on mathematical topics, and of three or four distinct publications which have become standard works.
Since the time of these early experiments, various other modes of detecting the existence of electric waves have been found out in addition to the spark-gap which he first employed, and the results of his observations, the earliest interest of which was simply that they afforded a confirmation of an abstruse mathematical theory, have been applied to the practical purposes of signalling over considerable distances (see Telegraphy, Wireless).
Tetzel's efforts irretrievably damaged the complicated and abstruse Catholic doctrine on the subject of indulgences; as soon as the coin clinks in the chest, he cried, the soul is freed from purgatory.
The abstruse nature of his studies, the mystical character of his writings, and the general indifference of the Romans to such subjects, caused his works to be soon forgotten.