﻿494 
  Geological 
  Society: 
  — 
  

  

  his 
  reasons 
  for 
  introducing 
  this 
  sketch 
  of 
  the 
  higher 
  dynamics. 
  It 
  

   will 
  appeal 
  strongly 
  to 
  the 
  few 
  students 
  who 
  have 
  the 
  requisite 
  

   ability 
  ; 
  and 
  for 
  those 
  who 
  have 
  not 
  a 
  more 
  detailed 
  discussion 
  

   would 
  be 
  equally 
  useless. 
  In 
  a 
  book 
  in 
  most 
  respects 
  so 
  admirable, 
  

   why 
  does 
  the 
  author 
  persist 
  in 
  usiug 
  the 
  misleading 
  phrase 
  

   u 
  coefficient 
  of 
  elasticity 
  " 
  ? 
  Thomson 
  and 
  Tait's 
  " 
  coefficient 
  of 
  

   restitution 
  " 
  is 
  much 
  to 
  be 
  preferred, 
  and 
  moreover 
  falls 
  into 
  line 
  

   with 
  Professor 
  Jeans's 
  own 
  appropriate 
  phrase 
  " 
  impulse 
  of 
  resti- 
  

   tution." 
  The 
  whole 
  section 
  headed 
  " 
  Elasticity 
  " 
  ought 
  indeed 
  to 
  

   be 
  revised, 
  especially 
  in 
  those 
  parts 
  in 
  which 
  the 
  word 
  elasticity 
  

   itself 
  appears. 
  Each 
  chapter 
  ends 
  with 
  a 
  number 
  of 
  problems 
  

   which 
  have 
  the 
  merit 
  of 
  being 
  essentially 
  practical. 
  

  

  XLIY. 
  Proceedings 
  of 
  Learned 
  Societies. 
  

  

  GEOLOGICAL 
  SOCIETY. 
  

   [Continued 
  from 
  p. 
  200.] 
  

  

  March 
  18th, 
  1908.— 
  Prof. 
  W. 
  J". 
  Sollas, 
  Sc.D., 
  LL.D., 
  F.P.S., 
  

  

  President, 
  in 
  the 
  Chair. 
  

  

  nPHE 
  following 
  communications 
  were 
  read 
  : 
  — 
  

  

  1. 
  ' 
  The 
  Carboniferous 
  Pocks 
  at 
  Loughshinny 
  (County 
  Dublin), 
  

   with 
  an 
  Account 
  of 
  the 
  Paunal 
  Succession 
  and 
  Correlation/ 
  By 
  

   Charles 
  Alfred 
  Matley, 
  D.Sc., 
  F.G.S., 
  and 
  Arthur 
  Vaughan, 
  B.A., 
  

   D.Sc., 
  F.G.S. 
  

  

  After 
  an 
  introduction 
  recalling 
  the 
  succession 
  at 
  Push, 
  already 
  

   described 
  by 
  the 
  authors, 
  a 
  detailed 
  account 
  is 
  furnished 
  of 
  the 
  

   various 
  sections 
  in 
  the 
  Loughshinny 
  area. 
  About 
  1100 
  feet 
  of 
  

   Carboniferous 
  rocks 
  are 
  exposed. 
  They 
  consist 
  mainly 
  of 
  limestone, 
  

   but 
  also 
  include 
  a 
  thick 
  mass 
  of 
  conglomerate 
  and 
  many 
  intercalated 
  

   beds 
  of 
  shale 
  and 
  chert. 
  The 
  rocks 
  have 
  been 
  much 
  folded, 
  and 
  to 
  

   some 
  extent 
  faulted. 
  The 
  lowest 
  rocks 
  belong 
  to 
  some 
  part 
  of 
  the 
  

   Dibunojyhyllum-Zone, 
  the 
  higher 
  range 
  through 
  CyatJiaxonia-Beds 
  

   into 
  Posidonomy 
  a-Limestones 
  and 
  shales 
  of 
  Pendleside 
  age. 
  The 
  

   Lane 
  Conglomerate 
  may 
  be 
  on 
  or 
  near 
  the 
  horizon 
  of 
  the 
  Push 
  

   Conglomerate. 
  Local 
  decalcification 
  has 
  caused 
  the 
  more 
  or 
  less 
  

   complete 
  disappearance 
  of 
  some 
  of 
  the 
  Cyathaoconia- 
  and 
  Posidonomya- 
  

   Limestones. 
  The 
  following 
  table 
  (p. 
  495) 
  gives 
  the 
  position 
  and 
  

   correlation 
  of 
  various 
  members 
  of 
  the 
  sequence. 
  

  

  The 
  region 
  was 
  close 
  to 
  an 
  old 
  shore 
  -line 
  of 
  the 
  Carboniferous- 
  

   Limestone 
  Sea, 
  the 
  actual 
  position 
  of 
  which 
  appears 
  to 
  have 
  been 
  

   almost 
  parallel 
  to, 
  and 
  a 
  short 
  distance 
  seaward 
  of, 
  the 
  present 
  coast- 
  

   line 
  between 
  Push 
  and 
  Skerries. 
  

  

  The 
  paper 
  closes 
  with 
  faunal 
  lists 
  from 
  the 
  various 
  subdivisions 
  

   and 
  exposures, 
  and 
  an 
  account 
  of 
  the 
  faunal 
  succession 
  and 
  corre- 
  

   lation, 
  both 
  by 
  the 
  second 
  author. 
  

  

  