Obituary — Professor BiscJiof. 45 



have gone over requires re-exaraination, and that six years would be 

 too short to enable one person to divide and correlate correctly, and 

 arrive at satisfactory conclusions as to modes of accumulation. In 

 connexion with this subject, I may express my belief that in order to 

 prevent any geologist assigning too much to the depositing- power of 

 ice in an extensively glaciated region like the Lake District, it is 

 important that he should be acquainted with the drifts of the adja- 

 cent plains, and of neighbouring or distant hilly districts in which 

 traces of glaciation are exceptional or altogether absent. It is like- 

 wise important that he should not be ignorant of the versatility of 

 the sea as a depositing agent. 



The question asked by Mr. Wollaston relative to the absence of 

 Skiddaw slate and granite from Dunmail Eaise, applies with nearly 

 equal force to the theory of transportation by great streams of land- 

 ice. In its bearing on ice-laden marine currents, I think it can be 

 satisfactorily answered. Currents impinging on an island (such as 

 Skiddaw must once have been) do not necessarily flow through all 

 the gaps or passes within sight of the island ; and a current may 

 have been prevented from flowing southwards from Skiddaw by an 

 east or west current traversing Keswick and Threlkeld vale. We 

 know that a current laden with boulders from Wasdale Crag flowed 

 over Stainmoor pass,^ but no trace of such a current has been found 

 in the Lune valley pass, south of Tebay railway-station. Granite- 

 laden cuiTents must have flowed south and sovith-west from the Esk- 

 dale Fells, but there are no indications of such currents having 

 flowed in any other directions. 



MiLLOM, Wi Decetnher, 1870. D. MACKINTOSH. 



OBXTTJ.A.ia'Y". 



PROFESSOR BISCHOF, FOR. MEMB. GEOL. SOC, LOND. 



Amongst the losses which science has sustained during the past 

 year, it is our melancholy duty to record the death of Professor 

 Bischof, of the University of Bonn, in Ehenish Prussia, who died in 

 that city on the 29th of November, in his seventy-ninth year. As 

 a tribute of respect to a man of science, of so throughly cosmo- 

 politan reputation, and whose labours have nowhere been more 

 appreciated than in England, we lay before our readers the follow- 

 ing short sketch of his scientific career. 



Carl Gustav Bischof was born on the 18th of January, 1792, at 

 Word, in the suburbs of Niirnberg, in Bavaria, where his father, sub- 

 sequently Eector of the Latin School of Eiirth, then resided. In the 

 year 1810 he entered the University of Erlangen, with the special 



1 Professor Harkness, in the last number of the Quart. Journ. Geol. See, sub- 

 merges the Lake District to a greater height than 700 feet above the level of 

 Dunmail Raise, and brings up false-bedded marine drift to 1,100 feet above the 

 present sea-level, or 100 feet higher than 1 have ventured to assert. 



