At the end of the previous number of “Blumea” could just be inserted the death notice of one of the honorary collaborators of the Rijksherbarium, Dr Ir A. W. Kloos, who passed away in his home at Dordrecht on June 3rd, 1952. A more detailed obituary may follow here. Abraham Willem Kloos was born at Wormerveer on April 10th, 1880. At West-Knollendam he attended his father’s school, afterwards went to the secondary school at Zaandam, and, in 1903, he took his degree as a civil engineer at Delft. Then, from 1904 till 1905 he worked as a teacher to the Nautical School, Schiermonnikoog, and from 1905 till 1911 he taught at the Secondary School, Goes. In the latter year Kloos was appointed to the Technical School, Dordrecht, where he worked until his retirement in 1945.