Historical Documents
A few documents of interest to the history of the Royal Netherlands Astronomical Society:
- An article in the popular scientific magazine 'Hemel en Dampkring' (in Dutch) in October 1918, announcing the birth of 'an Astronomical Study Association', which has now grown into the KNA-RNAS;
- The letter of adherence of the Nederlandse Astronomenclub to the International Astronomical Union in 1922;
- A lecture held at the occasion of the Second Lustrum in 1928 (in Dutch), by the then secretary-treasurer J. Stein;
- A lecture held at the occasion of the 25th anniversary in 1943 (in Dutch), by J.E. Baron de Vos van Steenwijk;
- An announcement of a NAC meeting on 15 April 1944 (in Dutch), in the occupied Netherlands towards the end of World War II;
- A hand-written letter by Henk van de Hulst to Adriaan Blaauw (in Dutch) suggesting a title for his lecture at the April 1944 NAC meeting;
- An article in the popular scientific magazine 'Hemel en Dampkring' (in Dutch) in 1969, detailing two lectures at the 50th anniversary celebration of the NAC, by Marcel Minnaert and J.E. Baron de Vos van Steenwijk;
- A slide show presented at the occasion of the centenary of the KNA-RNAS, by then chair Peter Barthel.