title: Echo Made Easy
author: Sam Kaddoura BSc(Hons)  BMBCh(Oxon)  PhD  DIC  FRCP  FESC  FACC
description: S. Kaddoura, Chelsea &amp; Westminster Hospital and Royal Brompton Hospital, London, UK
zlib_text: PURDUE UNIVERSITY
  TH IS IS  TO CERTIFY THAT TH E T H E SIS PR EPA R ED  U ND ER MY SU PER V ISIO N
  1 3  3 1
  BY
  W illiam  Worth Boyd
  ENTITLED 
  Ghsra0 te r j s 1 103 Of V ocation al School Shops
  In R ela tio n  To Achievement On A Standard Machine 
  Shop Teat
  COM PLIES W ITH TH E UNIVERSITY REG U LA TION S ON GRADUATION T H E SE S 
  AND IS  APPROVED BY ME AS FU LFILL IN G  TH IS PART O F TH E REQ U IREM EN TS 
  FO R  T H E D EG R EE  O F
  Doctor o f P hilosophy
  P r o f e s s o r  in C h a r g e  o r T h e s i s
  H e a r  o r  S c h o o l  o r  D e p a r t m e n t
  12= .
  TO TH E LIBRARIAN;----
  49r—
  TH IS T H E SIS IS NOT TO B E REGARDED AS CONFIDENTIAL.
  9^
  / /  
  PB0 rB 880B m  c
  GRAD, SCHOOL FORM O
  
  CHARACTERISTICS OF VOCATIONAL SCHOOL SHOPS 
  IN RELATION TO ACHIEVEMENT ON A 
  STANDARD MACHINE SHOP TEST
  A T h esis 
  Subm itted to  the F acu lty 
  o f
  Purdue U n iv e r sity  
  by
  W illiam  Worth Bojrd 
  In P a r tia l F u lfillm e n t o f the 
  Requirem ents fo r the Degree 
  of
  Doctor o f P hilosoph y 