190 Correspondence — A. R. Hunt 



of the central part of the Loch Awe Syncline with, their high 

 structural position. The hypothesis is that these rocks were not 

 deeply covered during their nietamorphism, and accordingly were 

 never raised to any very high temperature. 



coi?>i?.:ESi=0]sriDE:isroE!. 



CEITICAL TEMPEEATURES AND CEITICAL CONTEOVERSY. 



Sir, — Referring to Dr. Johnston-Lavis' letter, I am sorry if I have 

 failed to do him justice. I have a list of eighty of his papers to 

 1890, none, however, hearing on critical temperatures. If he will 

 send me references to any subsequent ones bearing on the action 

 of superheated water I shall be obliged. 



And now I must throw myself on your Editorial leniency and 

 that of your readers. 



On the day I received the proofs of the article which appears 

 this month I suffered a serious nervous collapse, and am under strict 

 orders to sptire myself in every way, and this just at a moment 

 when the Survey Memoir of Dartmoor makes it incumbent on me 

 to review neai'ly thirty years of observation of that district; and 

 Mr. Jukes-Browne's papers on "The Making of Torbay" and on 

 "The Torquay Limestones" do the same for about forty years' 

 reflections on the raised beaches and general geology of that district ! 

 In addition to this there is a good deal tliat wants saying about 

 Kent's Cavern. 



I am very sorry to have broached suhjects in your columns which 

 I cannot for the moment now defend, in critical controversy, but 

 I will trv to meet any objections, or yield to them, if possible 

 later on. If not in this Magazine, then somewhere else. 



A. R. Hunt. 



SouTHWooD, Torquay. 



March 7, 1913. 



PEEHISTOEIC BEADS. 



Sir, — As a supplement to ray letter in the Geol. Mag. for March, 



p. 138, and your reply thereto, pp. 139-43, I send you the following 



quotation from Sir Charles Lyell's Antiqtiity of Ifan (4th edition, 



p. 165). He writes as follows : " In the gravel-pits of St. Aeheul, and 



c b 





ft, fc, Porosphcera globularis, Phillips, copied from Lyell's Antiquity of Man, 

 4th ed., p. 165, fig. 22, 1873 ; c, part of same magnified. 



in some others near Amiens, small round bodies, having a tubular cavity 

 in the centre occur. They are well known as fossils of the White 

 Chalk. Dr. Rigollot suggested that they might have been strung 



