SECTIONAL TRANSACTIONS.— C. 359 



this region they are less than half the total thickness of the corresponding 

 measures in South Yorkshire. In addition, all the seams of coal show a 

 marked deterioration in an easterly direction, and if these conditions persist 

 to the east of the Trent there would appear little hope of workable coal 

 being encountered in North Lincolnshire. 



A re-examination of the materials of the Doddington or Harly boring 

 (six miles due west of Lincoln) revealed the presence of the Tenuis Zone 

 of Trueman, and the highest Coal Measures here are undoubtedly to be 

 correlated with the Upper Coal Measures of North Staffordshire and other 

 British coalfields. This is probably true of most, if not all, of the Red 

 Coal Measures recorded in numerous adjacent borings and sinkings. The 

 Upper Coal Measures thicken in an easterly direction, and at their base 

 has been discovered a pronounced unconformity or discordance. Thus 

 while there are only 230 ft. between the Top Hard Coal and the base of 

 the Upper Coal Measures at Harly or Doddington, the corresponding 

 measures are no less than 2,250 ft. thick at Maltby, 24 miles to the north- 

 west. If this overstep continues at a uniform rate to the east, there is 

 little likelihood of workable coal being found to the east of the city of 

 Lincoln. 



The writer concludes from the foregoing observations that the eastern 

 limit of the concealed coalfield can now be fairly precisely defined. 



Prof. W. G. Fearnsides, F.R.S., Mr. O. D. Kendall, Mr. S. H. 

 Beaver, Mr. K. C. Edwards, and Prof. C. B. Fawcett. 



Afternoon. 

 Excursion to Bunny and Normanton Hills. Leader, Mr. S. G. Clift. 



Tuesday, September 7. 



Dr. Rudolf Richter. — Problems of sedimentation and the advantages of a 

 Marine Geological Laboratory (lo.o). 



The author describes the scientific researches carried on in a marine 

 station for geologists, which has been established by the Senckenberg 

 Natural History Society of Frankfurt-am-Aiain on the German coast at 

 Wilhelmshaven. The deposition and reconstruction of sediments under 

 various circumstances are studied. The life of the shore is also observed 

 from the point of view of a geologist. Among other discoveries, it has 

 been found that mussels facilitate and hasten the deposition of fine mud 

 by swallowing it and converting it into hard pellets of excrement. 



Prof. W. G. Fearnsides, F.R.S. — Report on work of the Critical Sections 

 Cornmittee (10.50). 



Joint Discussion with Section L on The teaching of geology in schools. 



Chairman : Mr. H. G. Wells. 



Prof. A. E. Trueman. 



In recent years there has been a steady decrease in the attention paid to 

 geology in most schools, notwithstanding the great extensions in science 

 teaching during the same period. In view of the crowded school curriculum, 



