EDUCATIONAL AND DOCUMENTARY FILMS 299 



remain in existence for another year, during which it is hoped that a National 

 Film Institute, as recommended by the Commission, may be launched. 

 The foregoing Report has indicated at least one important direction in which 

 such an Institute could render good service to education. The Committee 

 are also impressed with the need of an Institute to act as a clearing-house 

 for the circulation of special films made by University and other research 

 departments. Many such films would be made if their circulation could be 

 guaranteed, but they are not now made because of the cost. There is also 

 a growing number of films made by travellers and private persons which 

 would be made available for general use through such an Institute. The 

 Committee are convinced that, from their point of view, the establishment of 

 a National Institute with adequate funds to carry on its work is an immediate 

 necessity. They would like to think that the passing of the Bill to legalise 

 the opening of cinemas in certain districts on Sundays has brought such an 

 Institute, with adequate funds, within the range of early probability. 



PALEOZOIC ROCKS OF ENGLAND AND WALES. 



Report of Committee appointed to excavate critical sectiotis in the Palceosoic 

 rocks of England and Wales (Prof. W. W. Watts, Chairman ; Prof. 

 W. G. Fearnsides, Secretary ; Mr. W. S. Bisat, Dr. H. Bolton, 

 Prof. W. S. BouLTON, Dr. E. S. Cobbold, Prof. A. H. Cox, Mr. 

 E. E. L. Dixon, Dr. Gertrude Elles, Prof. E. J. Garwood, Prof. 

 H. L. Hawkins, Prof. V. C. Illing, Prof. O. T. Jones, Prof. J. E. 

 Marr, Dr. F. J. North, Mr. J. Pringle, Dr. T. F. Sibly, Dr. 

 W. K. Spencer, Prof. A. E. Trueman, Dr. F. S. Wallis). 



Excavations at Careg Dyfan, Carmarthenshire, by Miss Emily Dix. 



The object of the excavation was to test a suggestion made by Dr. T. N. 

 George that some radiolarian cherts exposed at Llandyfan (on the north 

 crop of the South Wales Coalfield) overlie part of the Basal Grit of the 

 Millstone Grit. So far as known hitherto, such cherts mark the junction 

 of the Basal Grit with the underlying Carboniferous Limestone. The 

 work was undertaken by Miss Dix and the digging carried out by Mr. 

 W. D.Ware. 



A trench near Llandyfan Church proved 12 ft. of black shale and cherts 

 (with a few poorly preserved goniatites) resting on a thick grit. Above the 

 shales are about 50 to 60 ft. of grit, followed by black shale with banded 

 cherts containing wavellite. 



Digging and trenching at Careg Dyfan revealed the following, in descend- 

 ing sequence : 



Radiolarian cherts and brown shales containing Eumorphoceras sp. 

 and Posidonomya membranacea . 



(Beds unexposed and inaccessible 9 to 12 ft.) 



Coarse Grit proved for 9 ft. 



Plastic Clay series, weathered cherts and fine-grained sandstone. 



The radiolarian cherts at Careg Dyfan are probably of E age (similar to 

 those at Bishopston in Gower, on the south crop of the South Wales Coal- 

 field), and they are underlain by a thick grit. 



The goniatites have been examined by Mr. R. O. Jones and Mr. W. S. 

 Bisat. 



