The studies which especially attracted Tiberius were then called mathematical--we should now call them scientific--but neither was the science of the ancients our science, nor their mathematics our mathematics. The special branch of science which interested Tiberius was astronomy; but astronomy in his time was merged in astrology, and with astrology were associated other supposed means of predicting the future, that vain preoccupation of mankind. Great skill in judicial astrology was attributed by the ancients to Tiberius, and it is not likely that he escaped the intellectual contagions of his age; but we must be cautious in refusing to concede the possession of a truly scientific temperament to men of his age, or of much later ages, solely because they were credited by their contemporaries with sharing in what we now believe to be frivolous superstitions. Nearly a century after the death of Tiberius, Apuleius, the compiler and in part author of the famous _Golden Ass_, was accused before a Roman Proconsul of magic, and of having bewitched the somewhat elderly lady who had become his wife; his defence is still extant. There are many interesting points in it, not the least interesting being the inclusion of Moses in a list of eminent magicians; but the most striking features of the apology are the contemptuous way in which Apuleius deals with the current superstitions as to magic, and the indications that he was pursuing research on lines which would now be recognized as scientific--“You say I use mirrors; certainly I do; so did Archimedes. I am studying their influence on light and heat. You say that I have collected strange fishes; yes, I am interested in comparing the structure of their skeletons.” It is strange how old are modern superstitions. Among the charges against Apuleius was one of hypnotism, based upon the fact that a boy had been seen to fall senseless in his presence. Apuleius had no difficulty in proving that the boy was an epileptic. Hypnotism is still uncanny to the non-scientific world.