﻿PROCEEDINGS 
  OF 
  

   THE 
  EOYAL 
  SOCIETY. 
  

  

  vol. 
  xxiii. 
  No. 
  156. 
  

  

  CONTENTS. 
  % 
  

  

  November 
  19, 
  1874. 
  

  

  PAGE 
  

  

  I. 
  Note 
  to 
  the 
  "Report 
  on 
  the 
  Exploration 
  of 
  Brixham 
  Cave 
  (Phil. 
  Trans. 
  

  

  1873)." 
  By 
  a. 
  Busk, 
  F.R.S., 
  V.P.L.S 
  1 
  

  

  II. 
  On 
  the 
  Tides 
  of 
  the 
  Arctic 
  Seas.— 
  Part. 
  IT. 
  The 
  Tides 
  of 
  Northumberland 
  

   Sound 
  at 
  the 
  Northern 
  Outlet 
  of 
  Wellington 
  Channel.— 
  Part. 
  V. 
  The 
  

   Tides 
  of 
  Refuge 
  Cove 
  in 
  Wellington 
  Channel. 
  By 
  the 
  Eev. 
  Samuel 
  

   Haughton, 
  F.R.S., 
  M.D. 
  Dublin, 
  D.C.L. 
  Oxon 
  2 
  

  

  III. 
  On 
  Musical 
  Duodenes, 
  or 
  the 
  Theory 
  of 
  Constructing 
  Instruments 
  with 
  

   Fixed 
  Tones 
  in 
  Just 
  or 
  Practically 
  Just 
  Intonation. 
  By 
  Alexandek 
  

   J. 
  Ellis, 
  F.R.S., 
  F.S.A., 
  F.C.P.S., 
  F.C.P 
  3 
  

  

  November 
  26, 
  1874. 
  

  

  Preliminary 
  Notes 
  on 
  the 
  Nature 
  of 
  the 
  Sea-bottom 
  procured 
  by 
  the 
  Sound- 
  

   ings 
  of 
  H.M.S. 
  ' 
  Challenger 
  ' 
  during 
  her 
  Cruise 
  in 
  the 
  Southern 
  Sea 
  in 
  

   the 
  early 
  part 
  of 
  the 
  year 
  1874. 
  By 
  Professor 
  C. 
  Wyyille 
  Thomson 
  - 
  , 
  

   F.R.S., 
  Director 
  of 
  the 
  Civilian 
  Scientific 
  Staff 
  on 
  Board. 
  (Plates 
  I. 
  to 
  IY.) 
  32 
  

  

  [For 
  continuation 
  of 
  Contents 
  see 
  \th 
  'page 
  of 
  Wrapper.] 
  

  

  