THE 



QUARTERLY JOURNAL 



THE GEOLOGICAL SOCIETY OE LONDON. 



PROCEEDINGS 



OF 



THE GEOLOGICAL SOCIETY. 



December 15, 1852. 



Frederick William Smith Packman, Esq., M.D., and James Arthur 

 Morgan, Esq., were elected Fellows. 



The following communication was read : — • 



On Changes of the Sea Level effected by existing Physical 

 Causes during Stated Periods ©/"Time, By A. Tylor, Esq., 

 F.G.S. 



(Withdrawn by permission of the Council.) 



[Abstract.] 



In this communication, the author first calculated the probable 

 amount of the solid matter annually brought into the ocean by 

 rivers and other agents, in suspension and solution, and the conclu- 

 sion arrived at is, that the quantity of detritus thus distributed on the 

 sea-bottom would displace enough water to cause an elevation of the 

 mean ocean-level to the extent of at least three inches in 10,000 

 years. 



An attempt is then made to compute the number of such periods 

 of 10,000 years that must have elapsed during the accumulation of 

 the immense mass of freshwater deposits said to exist in the valley of 

 the Mississippi. The calculation is made from the data collected by 



VOL. IX. — part I. E 



