inst. 1 (pp. 1-42): March 15 – May 31, 1825 (May 23rd-May 31st). inst. 2-9 (pp. 48-48), incl. ”Tabellen”): June 1 – Dec. 7, 1825 (1-6th Dec.). inst. 10-12 (pp. 487-636): Dec. 7th, 1825 – March 15th 1826 (? Jan. – Febr. 1826). inst. 13 (pp. 638-730): Dec. 7th, 1825 – March 15th 1826 (prob. Febr. 1826). inst. 14-15 (pp. 731-942): July – Dec. 1826. inst. 16-17 (pp. 944-1169): Oct. 1826 – March 1827. June 1948. H.C.D. de Wit.