3th Internship of Joseph van den Berg1st Internship of Isidore Hofstede2nd Internship of Izaac Keizer2nd Internship of Abraham Baune2nd Internship of Salomon Mendes1st Internship of Petrus Mittelmeijer2nd Internship of Herman Bernard Speelman2nd Internship of Samuel Zamford1st Internship of Willy Premsela