1st Internship of Jan Carel Frederik Cordes1st Internship of Cornelis E. Bijvank1st Internship of Simon Nicolaas van Bentum3th Internship of Aron Vas Dias4th Internship of Louis Cohen1st Internship of Jacobus H. van Dyk3th Internship of Abraham N.J. Hankart1st Internship of Benj. Joh. Mart. den Hollander4th Internship of Machiel Hillesum4th Internship of Israel Klatzer1st Internship of Klaas Cornelis Koorstra1st Internship of Salomon Mendes3th Internship of Salomon Mendes1st Internship of Abraham Nykerk2nd Internship of Leendert Menist2nd Internship of Leendert Johannes Rademaker1st Internship of Anton den Rappen1st Internship of Gerardus Antonius Florentinus Peters3th Internship of Johannes B. de Ruijter2nd Internship of Willem Roodveldt2nd Internship of Benjamin de Beer3th Internship of Matthijs Sluijter3th Internship of Christoffel Marinus Stoete2nd Internship of Joseph de Vries1st Internship of Gerardus Jacobus Marie v.d. Woert2nd Internship of Izaac Coopman2nd Internship of Benjamin Coopman