Für die Befruchtung wurden 22 davon ausgewählt und jährlich, während der ganzen Versuchsdauer angebaut.
Twenty-two from these were selected for fertilisation and cultivated yearly throughout the duration of the experiment.
The second part of this sentence suggests that Mendel cultivated control populations alongside his hybridisation experiments. An alternative interpretation would be that Mendel is simply referring to the hybridisation experiments he carried out. This, however, would result in a rather trivial statement, and render the next sentence mysterious. On p. 9, s. 7 there is an instance were Mendel explicitly mentions experimental controls (Controlle), and in one of his letters to Carl von Naegeli he states that he had carried out “control experiments” (Controlversuche); see Carl Correns (ed.), Gregor Mendels Briefe an Carl Naegeli 1866–1873. Ein Nachtrag zu den veröffentlichten Bastardisierungsversuchen Mendels, Berlin: Julius Springer, 1905, 199.
The second part of this sentence suggests that Mendel cultivated control populations alongside his hybridisation experiments. An alternative interpretation would be that Mendel is simply referring to the hybridisation experiments he carried out. This, however, would result in a rather trivial statement, and render the next sentence mysterious. On p. 9, s. 7 there is an instance were Mendel explicitly mentions experimental controls (Controlle), and in one of his letters to Carl von Naegeli he states that he had carried out “control experiments” (Controlversuche); see Carl Correns (ed.), Gregor Mendels Briefe an Carl Naegeli 1866–1873. Ein Nachtrag zu den veröffentlichten Bastardisierungsversuchen Mendels, Berlin: Julius Springer, 1905, 199.