﻿RECENT 
  VOLUMES 
  OF 
  

  

  Philosophical 
  Transactions. 
  

  

  SERIES 
  A. 
  CONTAINING 
  PAPERS 
  OF 
  A 
  MATHEMATICAL 
  OR 
  PHYSICAL 
  

   CHARACTER. 
  

  

  Vol. 
  218 
  (1919). 
  Pp.442. 
  With 
  4 
  Plates. 
  Price 
  £1 
  15s. 
  

  

  Vol. 
  219 
  (1919). 
  Pp. 
  135. 
  With 
  9 
  Plates 
  and 
  6 
  Diagrams. 
  Price 
  17s. 
  6d. 
  

  

  Vol. 
  220 
  (1920). 
  Pp. 
  470. 
  With 
  5 
  Plates. 
  Price 
  £2 
  4,. 
  

  

  SERIES 
  B. 
  CONTAINING 
  PAPERS 
  OF 
  A 
  BIOLOGICAL 
  CHARACTER. 
  

  

  Vol. 
  208 
  (1918). 
  Pp.442. 
  With 
  24 
  Plates. 
  Price 
  £2 
  7s. 
  

   Vol. 
  209 
  (1920). 
  Pp.530. 
  With 
  70 
  Plates. 
  Price 
  £3 
  13s. 
  

  

  RECENT 
  PAPERS 
  IN 
  THE 
  PHILOSOPHICAL 
  TRANSACTIONS.' 
  

  

  A. 
  584. 
  INVESTIGATIONS 
  ON 
  LIGHTNING 
  DISCHARGES 
  AND 
  ON 
  THE 
  

   ELECTRIC 
  FIELD 
  OF 
  THUNDERSTORMS, 
  by 
  C. 
  T. 
  R. 
  W.L.50N, 
  F.R.S., 
  

   Reader 
  in 
  Electrical 
  Meteorology 
  in 
  the 
  University 
  of 
  Cambridge 
  and 
  Observer 
  in 
  Meteoro- 
  

   logical 
  Physics 
  at 
  the 
  Solar 
  Physics 
  Observatory, 
  Cambridge. 
  Pp. 
  43 
  ; 
  4 
  Plates. 
  Price 
  5s. 
  

  

  A. 
  585. 
  RESEARCHES 
  ON 
  THE 
  ELASTIC 
  PROPERTIES 
  AND 
  THE 
  PLASTIC 
  

   EXTENSION 
  OF 
  METALS. 
  By 
  W. 
  E. 
  DALBY, 
  F.R.S., 
  Professor 
  of 
  Engineering 
  

   at 
  the 
  City 
  and 
  Guilds 
  (Engineering) 
  College 
  of 
  the 
  Imperial 
  College 
  of 
  Science 
  and 
  

   Technology. 
  Pp. 
  22. 
  Price 
  3s. 
  6d. 
  

  

  A. 
  586. 
  THE 
  STRESS-STRAIN 
  PROPERTIES 
  OF 
  NITRO-CELLULOSE 
  AND 
  THE 
  

   LAW 
  OF 
  ITS 
  OPTICAL 
  BEHAVIOUR. 
  By 
  Prof. 
  E. 
  G. 
  COKER, 
  F.R.S., 
  and 
  

   K. 
  C. 
  CHAKKO, 
  M.Sc, 
  University 
  College. 
  London. 
  Pp. 
  24. 
  Price 
  4s. 
  

  

  A. 
  587. 
  THE 
  PHENOMENA 
  OF 
  RUPTURE 
  AND 
  FLOW 
  IN 
  SOLIDS. 
  By 
  

   A. 
  A. 
  GRIFFITH, 
  M.Eng. 
  (of 
  the 
  Royal 
  Aircraft 
  Establishment). 
  Pp. 
  36. 
  Price 
  3s. 
  6d. 
  

  

  A. 
  588. 
  REDUCTION 
  OF 
  ERROR 
  BY 
  LINEAR 
  COMPOUNDING. 
  By 
  W. 
  F. 
  

   SHEPPARD, 
  Sc.D., 
  LL.M. 
  Pp.39. 
  Price 
  3s. 
  6d. 
  

  

  A. 
  589. 
  TIDAL 
  FRICTION 
  IN 
  SHALLOW 
  SEAS. 
  By 
  HAROLD 
  JEFFREYS, 
  M.A., 
  

   D.Sc, 
  Fellow 
  of 
  St. 
  John's 
  College, 
  Cambridge. 
  Pp.26. 
  Price 
  3s. 
  6d. 
  

  

  A. 
  590. 
  PLANE 
  STRESS 
  AND 
  PLANE 
  STRAIN 
  IN 
  BIPOLAR 
  CO-ORDINATES. 
  

  

  By 
  G. 
  B. 
  JEFFERY, 
  M.A., 
  D.Sc, 
  Fellow 
  of 
  University 
  College, 
  London. 
  Pp. 
  29. 
  

   Price 
  3s. 
  6d. 
  

  

  B. 
  370. 
  ON 
  THE 
  STRUCTURE 
  OF 
  LYSOROPHUS, 
  AS 
  EXPOSED 
  BY 
  SERIAL 
  

   SECTIONS. 
  By 
  W. 
  J. 
  SOLLAS, 
  Sc.D.. 
  F.R.S., 
  Professor 
  of 
  Geology 
  in 
  the 
  University 
  

   of 
  Oxford. 
  Pp. 
  47 
  ; 
  1 
  Plate. 
  Price 
  7s. 
  6d. 
  

  

  B. 
  371. 
  TITLE. 
  CONTENTS, 
  INDEX, 
  &c. 
  Vol. 
  209. 
  Pp. 
  10. 
  Price 
  6d. 
  

  

  B. 
  372. 
  THE 
  RESPIRATORY 
  EXCHANGE 
  OF 
  MAN 
  DURING 
  AND 
  AFTER 
  

   MUSCULAR 
  EXERCISE. 
  By 
  J. 
  M. 
  H. 
  CAMPBELL, 
  O.B.E., 
  B.M., 
  C. 
  GORDON 
  

   DOUGLAS, 
  C.M.G., 
  M.C., 
  D.M., 
  Fellow 
  of 
  St. 
  John's 
  College, 
  Oxford, 
  and 
  F. 
  G 
  

   HOBSON, 
  D.S.O., 
  B.M. 
  Pp. 
  47. 
  Price 
  5s. 
  

  

  B. 
  373. 
  THE 
  MICROSCOPICAL 
  FEATURES 
  OF 
  MECHANICAL 
  STRAINS 
  IN 
  

   TIMBER 
  AND 
  THE 
  BEARING 
  OF 
  THESE 
  ON 
  THE 
  STRUCTURE 
  OF 
  

   THE 
  CELL-WALL 
  IN 
  PLANTS. 
  By 
  WILFRID 
  ROBINSON, 
  D.Sc, 
  

   Lecturer 
  in 
  Botany, 
  University 
  of 
  Manchester. 
  Pp. 
  34 
  ; 
  4 
  Plates. 
  Price 
  5s. 
  

  

  B. 
  374. 
  ON 
  A 
  FORM 
  OF 
  BOTRYTIS 
  CINEREA, 
  WITH 
  COLOURLESS 
  SCLEROTIA. 
  

   By 
  WILLIAM 
  B. 
  BR1ERLEY 
  (Rothamsted). 
  Pp. 
  32 
  ; 
  1 
  Plate. 
  Price 
  4s. 
  

  

  3.375. 
  THE 
  IRISH 
  ESKERS. 
  By 
  J. 
  W. 
  GREGORY, 
  D.Sc, 
  F.R.S. 
  Pp.37. 
  Price 
  4s. 
  

  

  B. 
  376. 
  THE 
  THERMO-ELASTIC 
  PROPERTIES 
  OF 
  MUSCLE. 
  By 
  A. 
  V. 
  HILL, 
  F.R.S., 
  

   and 
  W. 
  HARTREE. 
  Pp.21. 
  Price 
  2s. 
  

  

  Published 
  by 
  HARRISON 
  & 
  SONS, 
  Ltd., 
  44—47, 
  St. 
  Martin's 
  Lane, 
  London, 
  W.C.2. 
  

  

  