88 Correq^ondencc — G. E. Bihley — T. Sheppard — C Davison. 



depend upon the siipjily of snow, and eventually the deep channel 

 might be filled with ice to the bottom. — Yours truly, 



Pi. M. Deeley. 

 Melbouune House, Osmastox Road, Deuby. 

 Januari/ 11, 1909. 



PEARL FROM THE CHALK. 



SiK, — The interesting notice of Mr. Newton's paper on Chalk Pearls 

 in your January number recalled to my memory that I still possessed 

 the original pearl from which Mr. B. B. Woodward's section was cut. 

 Singularly enough the circumstance had entirely escaped the memory 

 of both of us until your notice referred me to Mr. IS^ewton's figure 

 and allowed me to recognize the section and the pearl as one and the 

 same specimen. Following Mr. Woodward's example I have had the 

 pleasure of presenting the larger half of the pearl to the British 

 Museum (Natural History), so they can in future be inspected in 

 the Geological Department. 



G. E. DiBLEY. 

 46, BuRGHiLi, Road, Sydenham, S.E, 

 Jannarij 13, 1909. 



FLINTS IN THE DRIFT. 

 SiK, — I am delighted to learn from Dr. Bather's note in your 

 January issue (p. 47) that flints are as abundant in Denmark as in 

 East Angiia, and doubtless the prehistoric Danes made their 

 implements from their own chalk-flints. If the word ' pink ' is 

 inserted before the word ' flint ' in line 9 of my previous letter (see 

 Geol. Mag., 1908, p. 575), it will, I think, be in order. In the 

 Trans. Hull Geol. Soc, 1902 (vol. v, pt. ii, p. 31), Mr. J. W. Stather 

 writes : — " Following Mr. C. Keid's surmise in the Holdcrness Memoir, 

 we have become accustomed to regard Denmark as the source of the 

 pmh flints, common in the Boulder clays of Holderness. This is an 

 error, as Mr. A. Jessen, of the Danish Geological Survey, recently 

 informed the secretary that pinh flints do not occur either in the 

 Cretaceous Itocks or the drifts of Denmai'k, and are quite unknown 

 there." 



T. Sheppabd. 



THE DISCUSSIONS AT THE GEOLOGICAL SOCIETY. 



SiE, — Though I have never had the pleasure of hearing a discussion 

 at the Geological Society, and do not know how closely the views 

 expressed there in full agree with the brief report subsequently given, 

 I should be glad if I might be allowed to make a suggestion. 



The publication of the discussion in the proceedings adds con- 

 siderably to the interest of papers to Fellows who, like myself, are 

 unable to attend the meetings. But the question I wish to ask is 

 whether their usefulness does not stop at this point? There are, of 

 course, cases when a paper deals with a subject closely studied by 

 those present, and when oven criticisms that are hastily composed 

 may have a value. There are other cases when the subject-matter 



