5.4 Collaborating with David Gill
77
Fig. 5.6 The instrument at the Cape Observatory that was used for taking the plates
for the Cape Photographic Durchmusterung. Plate I in the CPD, Kapteyn Astronomical
Institute, University of Groningen.)
such as the Batavian Society of Experimental Philosophy in Rotterdam and
the Province of Utrecht Society of Arts and Sciences. He had no room to put
up a measuring apparatus, but for this he was offered the use of two rooms in
the (Groningen) Physiological Laboratory of his friend Dirk Huizinga (1840–
1903). An experienced assistant was too expensive, but he found a solution for
that too by appointing a young man who had just come from the school for
crafts and technical workmen, and by training him himself. That was Teunis
Willem de Vries (1862–1937), who would continue to work for Kapteyn and
his successor Pieter van Rhijn until his retirement.
77
Fig. 5.6 The instrument at the Cape Observatory that was used for taking the plates
for the Cape Photographic Durchmusterung. Plate I in the CPD, Kapteyn Astronomical
Institute, University of Groningen.)
such as the Batavian Society of Experimental Philosophy in Rotterdam and
the Province of Utrecht Society of Arts and Sciences. He had no room to put
up a measuring apparatus, but for this he was offered the use of two rooms in
the (Groningen) Physiological Laboratory of his friend Dirk Huizinga (1840–
1903). An experienced assistant was too expensive, but he found a solution for
that too by appointing a young man who had just come from the school for
crafts and technical workmen, and by training him himself. That was Teunis
Willem de Vries (1862–1937), who would continue to work for Kapteyn and
his successor Pieter van Rhijn until his retirement.