"Vol. 65.] PROCEEDINGS OF THE GEOLOGICAL SOCIETY. ill 



The following communications were read : — 



1. 'The Relations of the Nubian Sandstone and the Crystal- 

 line Rocks south of the Oasis of Kharga (Egypt).' By Hugh John 

 Llewellyn Beadnell, F.G.S. (late of the Geological Survey of Egypt). 



2. ' On the Fossil Plants of the Waldershare and Fredville 

 Series of the Kent Coalfield.' By E. A. Newell Arber, M.A., F.L.S., 



F.G.S. 



The following specimens, lantern-slides, and sections were 

 exhibited : — 



Lantern-slides, exhibited by H. J. L. Beadnell, F.G.S., in 

 illustration of his paper. 



Fossil plants from the Kent Coalfield and lantern-slides, exhibited 

 by E. A. Newell Arber, M.A., F.L.S., F.G.S., in illustration of his 

 paper. 



Sections of the South Wales Coalfield, by H. K. Jordan, F.G.S., 

 presented by the South Wales Institute of Mining Engineers. 



November 18th, 1908. 



Prof. W. J. Sollas, LL.D., Sc.D., F.R.S., President, 

 in the Chair. 



The List of Donations to the Library was read. 



The following communication was read : — 



' On some Intrusive Rocks in the Neighbourhood of Eskdale 

 (Cumberland).' By Arthur Richard Dwerryhouse, D.Sc, F.G.S. 



Mr. T. V. Barker exhibited and described the method of using 

 some of the ' universal instruments ' devised by Prof. E. S. Fedoroff, 

 of St. Petersburg. The exhibit included the universal stage, the 

 graduated porcelain hemisphere (Prof. V. Nikitin), the stereo- 

 graphic rule, curved rule, crystal mirrors and globes, and various 

 forms of graduated compensator. The determination of the optical 

 constants, twin-law, and chemical composition of a plagioclase-twin 

 was carried out, as an illustration of the special advantages of the 

 universal stage. 



In addition to the exhibits described above, rock-specimens and 

 lantern-slides were exhibited by Dr. A. R. Dwerryhouse, F.G.S., 

 in illustration of his paper. 



