﻿Smithsonian 
  Report, 
  1943. 
  — 
  Weintraub 
  

  

  Plate 
  4 
  

  

  Effect 
  of 
  Penicillin 
  on 
  Growth 
  and 
  cell 
  Division 
  of 
  

   staph 
  yloccocus 
  aureus. 
  

  

  1, 
  control 
  culture 
  in 
  broth, 
  after 
  24 
  hours; 
  2, 
  3, 
  4, 
  cultures 
  in 
  broth 
  containing 
  0.00009 
  percent 
  penicillin, 
  

   after 
  3, 
  5, 
  and 
  24 
  hours 
  respectively. 
  Penicillin 
  permits 
  growth 
  of 
  the 
  cells 
  but 
  interferes 
  with 
  their 
  normal 
  

   division 
  and 
  separation. 
  (From 
  Smith 
  and 
  Hay, 
  Journal 
  of 
  the 
  Franklin 
  Institute, 
  June 
  1942.) 
  

  

  