812 Intelligence and Miscellaneous Articles. 



part of the peninsula. There is no doubt that it, like the similar 

 masses of Tonrmakeady and Glensaul, is of Arenig date. The 

 Silurian rocks consist principally of grits, sandstones, and calcareous 

 flags, and dip with great regularity in directions varying from 

 south to east. The calcareous flags (Finny School Beds) are highly 

 fossiliferous, and have yielded over fifty species, principally of corals 

 and brachiopods, which prove the beds to be of Llandovery age. 

 Ill-preserved specimens of Monograptus vomerinus, found in the 

 highest Silurian strata exposed, show that these are of Wenlock 

 age. 



Probably in early post-Silurian times occurred the intrusions of 

 keratophyre and labradorite-porphyrite which are met with at, or 

 near, the base of the Silurian. Then followed a period of important 

 earth-movement, connected in all probability with the Caledonian 

 movements in other regions. The area was folded into a syncline, 

 the axis of which ran roughly north-east and south-west ; and, 

 perhaps owing to the rigid mass of felsite in the northern part 

 of the peninsula, the Silurian rooks in adjusting themselves became 

 traversed by numerous cross-faults. At some later period, intru- 

 sions took place of numerous small dykes and sills of dolerite. 



LXXXV, Intelligence and Miscellaneous Articles. 



SOME APPLICATIONS OF THE ELECTRON THEORY OF MATTER. 

 CORRECTIONS, BY O. W. RICHARDSON, PROFESSOR OF PHYSICS, 

 PRINCETON UNIVERSITY. 



IEEGRET that in looking over the proofs of the above paper* 

 I failed to observe a number of errata. As these are suffi- 

 ciently numerous to confuse the reader in places, I wish to indicate 

 the following corrections : — 



• 7\f 7\-f 



P. 596. Equation (3), For df read <rty and for X_- read X— -. 



O x O- 



P. 597. In the line above equation (4) read K for k in the deno- 

 minator of the fraction, 

 P. 598. In the line below equation (8), for Jc read T. 

 P. 599. Line 9. For measuring read meaning, 

 P. 610. In the line above equation (35), for (3) read (28b). 

 In the line below equation (35), for (10) read (34). 

 In the line above equation (37), for {9) read (33). 

 P. 611. Line 6. For (14) read (36). 



P. 612. Line 15. For (17) read (39) and for (21) read (40). 

 Line 21. For (23) read (42) and for (22) read (41), 



P. 613. Equation f45). Eor i log C £dn read d ^- j log £ dn. 



P. 615. Line 9. For (37) read (47), Line 16. For (38) read (48), 



* Phil. Mag-, vol. xxiii. p. 594 ',1912). 



