He might have known when he wrote, he ought to have known then, that Dr. Robert Hare, of Philadelphia, who was eminent, distinctly and broadly eminent, as a scientist, had in 1855 published to the world a rigidly scientific _demonstration_ that some unseen agent, intelligent enough to understand and comply with verbal requests, repeatedly moved the arms of scale-beams contrary to the normal action of gravitation. Science, there and then, revealed the existence of some natural law or laws which permit unseen and impalpable intelligences, under some conditions, to put forth action upon matter, with force and to extent, which man can measure in pounds avoirdupois. That single achievement of modern science teaches the wisdom of exempting seemingly diabolized and mischievous children from charge of being devils incarnate, until we have determined whether some beings of greater powers and different dispositions may not have usurped control of youthful and pliant human forms, and through them manifested schemes and pranks that originated in supernal brains, and were enacted by use of such forces as can be manipulated by none below disembodied intelligences. Obviously he who was cognizant that science had made recent discoveries, suffered himself to remain in ignorance of what to him, as witchcraft historian, were the most pertinent and important parts of the knowledge recently gained; ignorant of those parts which were most closely connected with philosophical solution of the mysteries which pervaded the history he was elaborating. His blindness to what science--yes, to what exact physical science--by her rigid processes of weighing and measuring had positively _demonstrated_, bespeaks his short-comings, and would bespeak the unphilosophical stand-point of any historian of, or critic upon, the world's marvels, who, since the day of Hare, ignores the light radiating from his demonstration, and continues to grope on in darkness which use of that light would dispel. Take into the catalogue of natural agents and forces all those whose existence and action, science, as applied by Dr. Hare twenty years ago, and again by Mr. Crookes and others in England more recently, backed, too, by the observations and tests of thousands less erudite, has _demonstrated_, and then all occasion to look upon our fathers as numskulls, and their daughters as proficient devils, at once disappears. New England soil, two centuries ago, was not populated mainly by jack-asses; and even had it been, their offspring would have been neither monkeys nor hyenas. Since the work by Dr. Hare, entitled "Spiritualism Scientifically Demonstrated," may not be readily accessible by many readers, his description of one demonstrative process is quoted from page 49, as follows:--