152 Scientific Intelligence. 
It is probable, from recent discoveries, that the Arctic flora, 
referred to the Miocene by Heer, was actually Eocene ; and if so, 
Professor Haughton’s conclusion as to the length of after time 
would be more reasonable, But so many doubts invest the sub- 
of a number of large rivers is estimated, an m 
deduced; and Lecture VI, on the Geographical Distribution of 
Animals and Plants, which treats also of the relations of species 
to climates with reference to geological questions, and assumes 
the existence of a once large and flourishing Antarctic Continent 
to help in explaining the origin of the resemblances which exist 
Sout 
1¢ Tail 
Many other topics, besides these here mentioned come under 
consideration in Professor Haughton’s volume, making it a work 
of wide interest. 
Address by H. C. Sorpy, F.R.S., President of the Ge0- 
logical Society of London, at the Anniversary meeting in Febrt- 
ary, 1880. 60 pp. 8vo.—Mr. Sorby’s presidential address 1s one 
of the most important of recent contributions to geologica 
scopic investigation into the condition and_ structure of the 
grains of non-calcareous stratified rocks, carried on in order to 
study out the true history or mode of origin of the rocks ; and the 
rocks which are considered embrace tragmental rocks, from loose 
rocks, and slates as the passage way b en the metamorph 
and the preceding. The methods of distinguishing microscopl™” 
ally som th ommon minerals in slices and in sane, 
the aid of polarized light, are also considered and elucidated by 
ew rese s. The lopment also of lamination, 
slaty structure and foliation, is among the subjects of investigatio” 
and receives new light. the various topics are brought out 1 
rock, whether friable or not, consisting of an aggregation, 
