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Zwingli held their famous conference on Consubstantia- 

 tion and Transubstantiation. Here for a time lived 

 William Tyndale, translator of the Bible into English, 

 who was afterwards strangled and burnt in Vilvorden. 

 Here Wolff expounded his philosophy, and here Denis 

 Papin invented his digester, and is said to have in- 

 vented a working steam-engine. The principal figure in 

 the university at the time of our visit was Bunsen, who 

 had made his name illustrious by chemical researches 

 of unparalleled difficulty and importance, and by his 

 successful application of chemical and physical princi- 

 ples to explain the volcanic phenomena of Iceland. It 

 was he who first laid bare the secret of the geysers of 

 Iceland and gave the true theory of their action. A 

 very worthy old professor named Gerling kept the Ob- 

 servatory and lectured on physics. Professor Steg- 

 mann, an excellent teacher, lectured on mathematics, 

 Ludwig and Fick were at the Anatomical Institute, 

 Waitz lectured on philosophy and anthropology, Hessel 

 expounded crystallography, while my accomplished 

 friend Knoblauch arrived subsequently from Berlin. 

 The university at the time numbered about three hun- 

 dred students, and it suited my mood and means far 

 better than one of the larger universities. 



In the excellent biography of Dr. Birkbeck recently 

 published by Dr. Godard, which to the writer of it was 

 evidently a labour of love, the name of Birkbeck is re- 

 ferred to the little river of that name which rises in 

 the "Birkbeck fells" in Westmoreland. "Beck" is 

 stream in the North, and " Birk " is birch, so that 

 " Birkbeck " means Birchstream. Turned into German 

 there would be very little change. For here also Birch 

 is Birk, while Beck is Bach. In Marburg I lived on 

 the Ketzerbach, a street through the middle of which 

 ran an open brook fringed with acacias. Before the 



