Following the chronological order we are here adopting, we next have to recur to the labours of Nitzsch, who, in 1820, in a treatise on the nasal glands of birds - a subject that Nitzsch had already attracted the attention of Jacobson (Nouv.
Jacobson, De fabulis ad Iphigeniam pertinentibus (1888); R.
Jacobson, Lehrbuch der organischen Chemie; Richter-Anschutz, Organische Chemie (I I th ed., K 2 S04 K2 S04 (NH 4) 2 SO 4 =o% SO 4 = coo FIG.
Meta-oxyazobenzene, C 6 H 5 N: N(1)C 6 H 4 OH(3), was obtained in 1903 by P. Jacobson (Ber., 1903, 36, p. 4 0 93) by condensing ortho-anisidine with diazo benzene, the resulting compound being then diazotized and reduced by alcohol to benzene-azometa-anisole, from which meta-oxyazobenzene was obtained by hydrolysis with aluminium chloride.
Jacobson, Handboek voor de Kultuur en Fabrikatie van Thee (3 vols., 1843); S.