L. Löw[47] collects from the Scripture and post-Biblical Talmud, German and other literature, instances of rejuvenescence in the old which ancient Hebrew writers seem to have stressed. We all know that sight sometimes comes back, perhaps to a marked degree, but Löw quotes cases where wrinkles vanished, the hair was restored to its youthful shade and increased in quantity, while teeth, after years of decay, have sometimes grown from new roots--occasionally more than once. In many cases sex potency has been restored as well as muscular strength, freshness of complexion, and, more rarely, hearing. Myths, of course, of many races detail cases where magic sleep lasting many, perhaps a hundred, years has converted age into youth, and in Semitic folklore this is often connected with the passage, “The righteous shall renew their strength like the eagle.” The Hebrews were perhaps even more fond than other people of dividing life into periods, usually in conformity to the magic numbers 3, 4, 7, etc. The comparison of age with the four seasons was very common, and here we may perhaps mention Lotze’s effort to harmonize the life span with the four temperaments. For him, childhood is sanguine on account of the ease of excitation, the keenness of response to sensation, the ready passage of impulse to action, and the fluctuations of mood. Youth he calls melancholic and emotionally characterized by _Stimmungen_. It judges the items of experience by their effect upon feeling and upon self, and oscillates readily and widely from pleasure to pain. Mature manhood is choleric, practical, executive, with definiteness of aim and fulfillment of ideas and even phantasies but with less excitability of emotion; while old age is phlegmatic, seeks repose, and has been taught by experience to abate the life of affectivity and take the attitude of _laissez faire_. In the modern Jewish family the authority of and respect for the father is great, more among the orthodox and conservative than the liberal and reformed wing of Judaism. The grandfather and -mother are always provided for, although their authority and influence are generally greatly diminished.