ANOTHER our “Scientific Worthies” has “crossed the bar,” leaving behind an honoured name and works that will perpetuate his memory. On Monday evening Prof. Tyndall passed away at his residence, near Haslemere. For some time previous he had been suffering from insomnia and rheumatism, and very unfavourable symptoms set in on Monday morning. He quickly became unconscious, and except for a brief interval at midday, remained in this state until half-past six o'clock, when a peaceful change from life to death took place. It appears that the cause of death was an overdose of chloral, which Prof. Tyndall took as a sedative against insomnia. He had been in the habit of taking narcotics for several years past in order to overcome the sleeplessness from which he suffered. On Monday about the usual quantity was administered to him, but his greatly weakened condition was unable to bear so much. The inquest on the body, which was considered necessary by the doctors, was held yesterday.