﻿366 
  JOURNAI^ 
  OF 
  THE 
  WASHINGTON 
  ACADEMY 
  OF 
  SCIENCES 
  VOIv. 
  12, 
  NO. 
  15 
  

  

  It 
  is 
  concluded, 
  therefore, 
  that 
  in 
  post-Beekmantown 
  time, 
  pre- 
  

   ceding 
  Conestoga 
  deposition, 
  the 
  southern 
  part 
  of 
  the 
  area 
  was 
  up- 
  

   lifted 
  and 
  the 
  older 
  formations 
  were 
  successively 
  exposed 
  by 
  erosion 
  

   from 
  the 
  Ledger 
  dolomite 
  near 
  Lancaster 
  to 
  the 
  Harpers 
  schist 
  at 
  

   Mine 
  Ridge, 
  and 
  that 
  the 
  Conestoga 
  formation 
  was 
  then 
  laid 
  down 
  

   across 
  the 
  eroded 
  edges 
  of 
  these 
  formations, 
  the 
  waste 
  from 
  the 
  re- 
  

   spective 
  underlying 
  formations 
  being 
  incorporated 
  in 
  its 
  basal 
  beds. 
  

  

  SCIENTIFIC 
  NOTES 
  AND 
  NEWS 
  

  

  Dr. 
  Lewis 
  M. 
  Hull, 
  who 
  for 
  several 
  years 
  has 
  been 
  engaged 
  in 
  studies 
  of 
  

   electron 
  tubes 
  in 
  the 
  radio 
  laboratory 
  of 
  the 
  Bureau 
  of 
  Standards, 
  has 
  re- 
  

   signed 
  to 
  accept 
  a 
  position 
  as 
  Director 
  of 
  Research 
  of 
  the 
  Radio 
  Frequency 
  

   Laboratories, 
  Inc., 
  of 
  Boonton, 
  N. 
  J. 
  

  

  E. 
  A. 
  ScHWARZ 
  received 
  the 
  honorary 
  degree 
  of 
  Doctor 
  of 
  Philosophy 
  at 
  

   the 
  commencement 
  exercises 
  of 
  the 
  University 
  of 
  Maryland 
  on 
  June 
  10. 
  

  

  Norman 
  Snyder, 
  a 
  member 
  of 
  the 
  scientific 
  staff 
  of 
  the 
  Radio 
  Laboratory 
  

   of 
  the 
  Bureau 
  of 
  Standards, 
  left 
  the 
  Bureau 
  June 
  1st 
  for 
  a 
  leave 
  of 
  absence 
  

   of 
  several 
  months. 
  During 
  this 
  time 
  Mr. 
  Snyder 
  will 
  be 
  with 
  the 
  Research 
  

   Laboratory 
  of 
  the 
  General 
  Electric 
  Co. 
  at 
  Schenectady, 
  where 
  he 
  will 
  work 
  

   on 
  electron 
  tube 
  problems. 
  

  

  Paul 
  C. 
  StandlEy, 
  of 
  the 
  National 
  Museum, 
  returned 
  to 
  Washington 
  

   in 
  June 
  from 
  several 
  months' 
  botanical 
  collecting 
  in 
  El 
  Salvador 
  and 
  Guate- 
  

   mala. 
  

  

  Dr. 
  Knud 
  Stephensen 
  of 
  the 
  Zoological 
  Museum 
  at 
  Copenhagen, 
  well 
  

   known 
  for 
  his 
  biological 
  survey 
  of 
  the 
  Brede 
  Fjord 
  in 
  southwestern 
  Green- 
  

   land 
  and 
  for 
  his 
  studies 
  on 
  the 
  Crustacea, 
  accompanied 
  by 
  Messrs. 
  Taaning 
  

   and 
  Olsen, 
  recently 
  visited 
  the 
  National 
  Museum. 
  

  

  Dr. 
  Richard 
  C. 
  Tolman 
  has 
  resigned 
  as 
  director 
  of 
  the 
  Fixed 
  Nitrogen 
  

   Research 
  Laboratory 
  to 
  take 
  a 
  position 
  in 
  the 
  California 
  Institute 
  of 
  Tech- 
  

   nology. 
  He 
  is 
  succeeded 
  by 
  Dr. 
  F. 
  G. 
  Cottrell. 
  

  

  E. 
  D. 
  Williamson, 
  of 
  the 
  Geophysical 
  Laboratory, 
  left 
  Washington 
  in 
  

   July 
  to 
  attend 
  the 
  meeting 
  of 
  the 
  British 
  Association, 
  where 
  he 
  will 
  present 
  

   a 
  paper 
  on 
  the 
  high 
  pressure 
  work 
  of 
  the 
  Geophysical 
  Laboratory. 
  

  

  