A highly technical scientific book that starts with a quotation from Goethe and closes with a measure of the Fifth Symphony of Beethoven is somewhat unusual. The motif of the book is introduced poetically: "In the darkest castle of the Westphalian earth lie inflammable stones that represent the remains of majestic prehistoric forests, grown under the rays of a tropical sun. Recovery of the stones is accompanied by death, mutilation and manifold diseases, among the most peculiar of which is the miner's nystagmus." This motif is elaborated in the woodwinds by an analysis of the graphic curves of some 150 cases of nystagmus, recorded with the different instruments that have been developed by the author. A subdivision of the thema shows three main types of nystagmus:
From the region of Deiters' nucleus.
From the central optic radiations.
From the cortical