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E. W. Brayley supported this view of planetary production in 1864, and it has recommended itself to Haidinger, Helmholtz, Proctor, and Faye. But the negative evidence of geological deposits appears fatal to it. The theory of solar energy now generally regarded as the true one was enounced by Helmholtz in a popular lecture in 1854.
For any one who desires to geologise in Hungary and Transylvania there is abundant assistance to be obtained in the maps which have been issued by the Imperial Geological Institute of Vienna, under the successive direction of Haidinger and Von Hauer.
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