The six lectures that Hegel gave in Berlin on the philosophy of nature are not complete, but they are sufficiently preserved to provide a reliable picture of the development of this discipline.
They are published in four volumes:
The first volume contains a total of seven transcripts of Hegel’s lectures on the philosophy of nature from the winter semesters of 1819/20, 1821/22, and 1823/24. For documenting the first lecture series, the transcript by Johann Rudolf Ringier was chosen (with variants from the transcript by Gottfried Bernhardy), for the second lecture series, the transcript by Boris von Uexküll (with variants from two anonymous transcripts), and for the third lecture series, the transcript by Karl Gustav Julius von Griesheim (with variants from the transcript by Romuald Hube). This volume documents Hegel’s development of the philosophy of nature based on the first edition of the Enzyklopädie (1817) and thus enables a reliable understanding of his philosophy of nature.
The second volume follows with the transcripts of the lectures from the years 1825/26 (transcript by Moritz Eduard Pinder with variants from the transcript by Heinrich Wilhelm Dove) and the summer semester of 1828 (transcript by Alexander Friedrich von Hueck with variants from the transcript by Karol Libelt). (GW 24,2).
The third volume contains the additions (GW 24,3), and the concluding fourth volume includes the editorial report and commentary. (GW 24,4).
Simon Gros 
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