This appendix lists all persons who can be considered to belong or to have belonged to the scientific staff, from 1829 till now. Honorary collaborators are included, if their appointment was more or less official (this is sometimes not quite clear, however). Also included are the staff-members not paid by the university but by private foundations, by official bodies like the Netherlands Organization for the Advancement of Pure Research (Z.W.O.), etc. Student-assistants are not included. Technicalities of ranks and promotions have been omitted. Biographical data have been kept at a minimum, for many persons more material is available in the ‘Personalia’ file at the Rijksherbarium.