364 Notes and News. 



The following table, showing - the boulders of two selected 

 localities in the southern part of the Yorkshire Coast and 

 two in the northern part, will serve to illustrate the general 

 distribution : — 





Dimling'- 

 ton. 



North 

 Ferriby. 



Whitby. 



Saltburn. 



1. Carboniferous sandstones 



and limestones ... 



2. Basalt (whin-sill) ... 



3. Magnesian limestone 



4. Granite, gneiss, etc. 



Per cent. 



55 



32 

 13 



Per cent. 



59 

 30 



11 



Per cent. 



70 



24 



5 

 1 



Per cent. 



73 



20 



7 



0 



100 



100 



100 



100 



The investigation shows — (1) The proportion of Carboniferous 

 sandstones and limestones increases northward. (2) The whin- 

 sill increases southward proportionately though not numerically, 

 probably bearing transport better than (1). (3) The magnesian 

 limestone in the form of large boulders disappears southward. 

 (4) The granites, gneisses, etc., decrease both proportionately 

 and in numbers northward, except in the Shap granite and the 

 Cheviot porphyrites, which show a rapid increase in the same 

 direction. A considerable number of (4) agree with well-known 

 rock types of Scandinavia, and these are more plentiful in the 

 south of the county and in Lincolnshire than in North Yorkshire. 

 The unknown rock types included in the same group agree in 

 this respect with these recognisable Scandinavian rocks. 



The distribution of the Cheviot porphyrites, which occur 

 principally as stones and pebbles of smaller dimensions than the 

 boulders of the above table, presents some points of peculiar 

 interest. These, besides increasing in numbers towards their 

 source, are also more abundant in the upper boulder clays and 

 in the gravels at the highest levels; while, on the other hand, 

 the Scandinavian rocks, either as pebbles or boulders, rarely 

 occur in either position. 



NOTES AND NEWS. 



The increasing- interest taken in the study of Astronomy has induced the 

 Proprietors of ' Knowledge ' to issue an annual for students and workers in 

 that Science specially devoted to their requirements. It is entitled ' Know- 

 ledge Diary and Scientific Handbook, 1901.' and will contain, amongst 

 other things, useful Tables, Orig-inal Articles, Calendar of Scientific Events, 

 and a blank Diary portion. 



Naturalist, 



