SHEPPARD : SHAP GRANITE, ETC., IN LINCOLNSHIRE. 339 



< erratics ' is not uninteresting, and it is such facts as these that we 

 must have in order to solve the complex glacial problems that are 

 occupying the attention of so many of the geologists of to-day. 

 No matter what theory may be advanced in order to explain the 

 presence of these boulders, the records of the boulders themselves 

 must be first considered. 



In conclusion, I sincerely hope that an earnest effort will be 

 made, by all who are able, to help the Lincolnshire Boulder Com- 

 mittee in their work. The Yorkshire Boulder Committee have now 

 been in existence some ten years, and have each year printed most 

 valuable reports, though the county is far from being 'worked 

 out' yet. 



The ■ East Riding ' Boulder Committee, which reports to the 

 Yorkshire Boulder Committee, has divided the area under its super- 

 vision into mile squares, each member taking one or more of these 

 -quares and reporting all the large boulders occurring in the area 

 allotted to him. By this means a systematic record is being made 

 and though we can hardly expect our few, too few, fellow-workers in 

 Lincolnshire to adopt the same course just yet, it is to be hoped 

 this method will be carried out in time to come. 



Unlike the other sections of the Lincolnshire Naturalists' Union, 

 the geologists are able to pursue their field-work, and with good 

 result too, during the winter months. In fact, for boulder recording, 

 wet weather is decidedly preferable,- as the rocks show off to far 

 greater advantage when wet, and can thus be identified with much 

 greater ease. We need only go into one of the numerous ' cobble • 

 paved yards that abound in districts where Boulder Clay occurs (the 



being 



In dry weather 



be 



have been thoroughly cleaned with rain, it is quite surprising what 

 a variety of granites, porphyrites, schists, limestones, sandstones, etc., 

 can be seen. This variety is also noticeable, though not to such an 

 appreciable extent, among the larger erratics. 



Mr. J. Lomas, speaking of striated surfaces in the Liverpool 

 district, says — 4 It is worth remarking that the striae more thickly 

 congregate in places where geologists reside?* Let us hope that our 

 Lincolnshire boulder reports will shortly show a similar result. 



The illustration given on page 336 is prepared from a snap- 

 shot of a Dortion of the nartv at Louth, whilst walking down a slight 



^ — .* „ w „ 



incline. I am ir 

 use of the same. 



perm is 



* /-* 



Glacialiits' Magazine, Vol. III., 1895, p. 21 



^»Ov. 1896, 



