﻿CONTENTS. 
  IX 
  

  

  PAGE 
  

  

  XXXVII. 
  On 
  the 
  Optical 
  Phenomena 
  and 
  Crystallisation 
  of 
  Tourmaline, 
  

   Titanium, 
  and 
  Quartz, 
  within 
  Mica, 
  Amethyst, 
  and 
  Topaz. 
  

   By 
  Sir 
  David 
  Brewster, 
  K.H., 
  D.C.L., 
  F.R.S., 
  and 
  

   V.P.R.S.Edin. 
  (With 
  aiPlate.) 
  . 
  . 
  .547 
  

  

  XXXVIII. 
  On 
  the 
  Production 
  of 
  Crystalline 
  Structure 
  in 
  Crystallised 
  Pow- 
  

   ders, 
  by 
  Compression 
  and 
  Traction. 
  By 
  Sir 
  David 
  Brewster, 
  

   K.H., 
  D.C.L., 
  F.R.S., 
  V.P.R.S.Edin. 
  . 
  . 
  .555 
  

  

  XXXIX. 
  On 
  the 
  Absolute 
  Zero 
  of 
  the 
  Perfect 
  Gas 
  Thermometer 
  j 
  being 
  a 
  

   Note 
  to 
  a 
  Paper 
  on 
  the 
  Mechanical 
  Action 
  of 
  Heat. 
  By 
  Wm. 
  

   J. 
  M. 
  Rankine, 
  C.E., 
  F.R.S.E., 
  F.R.S.S.A., 
  &c. 
  . 
  561 
  

  

  XL. 
  On 
  the 
  Mechanical 
  Action 
  of 
  Heat. 
  By 
  Wm. 
  J. 
  M. 
  Rankine, 
  

  

  C.E., 
  F.R.S.E., 
  F.R.S.S.A., 
  &c, 
  . 
  . 
  .565 
  

  

  XL 
  I. 
  On 
  Nitric 
  Acid 
  as 
  a 
  Source 
  of 
  the 
  Nitrogen 
  found 
  in 
  Plants. 
  By 
  

  

  George 
  Wilson, 
  M.D., 
  . 
  . 
  . 
  . 
  .591 
  

  

  XLTI. 
  Some 
  Observations 
  on 
  Fish 
  in 
  relation 
  to 
  Diet. 
  By 
  John 
  Davy, 
  

   M.D., 
  F.R.S. 
  Lond. 
  & 
  Ed., 
  Inspector-General 
  of 
  Army 
  Hos- 
  

   pitals, 
  ....... 
  599 
  

  

  XLIII. 
  On 
  Circular 
  Crystals. 
  By 
  Sir 
  David 
  Brewster, 
  K.H., 
  D.C.L., 
  

  

  F.R.S., 
  and 
  V.P.R.S. 
  Edin. 
  (With 
  Two 
  Plates.) 
  . 
  607 
  

  

  Proceedings 
  at 
  Statutory 
  General 
  Meetings, 
  §c, 
  

   List 
  of 
  the 
  present 
  Ordinary 
  Members, 
  in 
  the 
  order 
  of 
  their 
  Election, 
  

   List 
  of 
  Non-Resident 
  and 
  Foreign 
  Members, 
  elected 
  ander 
  the 
  Old 
  Laws, 
  

   , 
  Honorary 
  Fellows, 
  ..... 
  

  

  Felloius 
  Deceased, 
  Resigned, 
  or 
  Cancelled, 
  from 
  1849 
  to 
  1853, 
  

   Public 
  Institutions, 
  $c, 
  entitled 
  to 
  receive 
  the 
  Transactions 
  and 
  Proceedings 
  

   of 
  the 
  Society, 
  ...... 
  

  

  List 
  of 
  Donations, 
  continued 
  from 
  Vol. 
  XV 
  I., 
  page 
  648, 
  

  

  Index, 
  ........ 
  

  

  Laws 
  of 
  the 
  Society, 
  

  

  625 
  

   634 
  

   641 
  

   641 
  

   643 
  

  

  645 
  

   647 
  

   665 
  

  

  VOL. 
  XX. 
  

  

  