“…Barbital is excreted into the urine, during several days. In man, 70 per cent is excreted in 5 days, but the excretion continues up to 2-3 weeks (FISCHER & VON MEERING 1904) In animals, barbital is excreted solmewhat more quickly, abouit 50 per cent in 24-48 hours, but the excretion continues up to 7 days (REINERT 1928, SCHLOSSMAN 1933.…”