I was familiar with his Life (Leben) of Hegel (1844) (below), but the quote I’m posting here is from a later book he wrote for Hegel's centennial in 1870 (bottom):
—Karl Rosenkranz, Hegel as the National Philosopher of Germany (translated by G.S. Hall) p. 128, 1874[In the second part of his Encyclopedia,] Hegel attempts to apply dialectics to the scientific treatment of nature. He did this himself in a very imperfect way, but there is no doubt that science will be compelled to come back eventually to this method.
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