﻿Ceehoke. 
  

  

  Fig. 
  3. 
  — 
  Aluminium 
  spheres 
  O607 
  cm. 
  diameter 
  suspended 
  in 
  air 
  by 
  

   silk 
  fibres 
  moistened 
  with 
  glycerine. 
  

  

  Fig. 
  4. 
  — 
  Steel 
  spheres 
  0*794 
  cm. 
  diameter 
  suspended 
  by 
  copper 
  wires 
  0*0038 
  cm. 
  

   diameter 
  in 
  castor-oil. 
  No 
  surrounding 
  screen. 
  

  

  