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Adopting this name, Schwann propounded what soon became famous as his cell theory, under title of Mikroskopische Untersuchungen uber die Ubereinstimmung in der Structur und dent Wachsthum der Thiere und Pflanzen. So expeditious had been his work that this book was published early in 1839, only a few months after the appearance of Schleiden's paper.

This paper is in itself of value, yet the most important outgrowth of Schleiden's observations of the nucleus did not spring from his own labors, but from those of a friend to whom he mentioned his discoveries the year previous to their publication. This friend was Dr. Theodor Schwann, professor of physiology in the University of Louvain.

I hope that it may do the same in the clerical world; and I earnestly beg those clergymen who heard me with so much patience and courtesy at Sion College, to ponder well Mr. Mivart's last chapter, on "Theology and Evolution." Quoted from Schleiden's "The Plant, a Biography." Lecture XI. in fine. I am well aware what a serious question is opened up in these words.

Buist of Bombay, and the other was the description of the Indian Ocean, which was quoted from Schleiden's Lecture.

Even as late as 1845, however, a botanist of Schleiden's eminence dealt very sceptically with these statements; and his scepticism was the more justified, since Ehrenberg, in his elaborate and comprehensive work on the Infusoria, had declared the greater number of what are now recognised as locomotive plants to be animals.