1st Internship of Johannes Buckert3th Internship of Jan Bernardus Brusse3th Internship of Simon Nicolaas van Bentum1st Internship of Hubert Daudt1st Internship of George Gottfried Graeve4th Internship of Willem Marinus de Geest1st Internship of Willem Karel Frederik Heij5e Internship of Johannes Gerardus Kat1st Internship of Hendrik Mars3th Internship of Willem Gerardus Balthazar Maurer2nd Internship of Johannes Wilhelmus Maurer3th Internship of Jacobus A. Meyer1st Internship of Johan H. Moriën3th Internship of Jan Hendrik Moorman1st Internship of Willem Mol2nd Internship of Jan Schutz1st Internship of Cornelis Segaar1st Internship of Hendrikus Johannes Tolhuijs3th Internship of Cornelis van Zutphen1st Internship of Karel Lodewijk Buker