﻿ACADEMY 
  OF 
  SCIENCES. 
  

  

  261 
  

  

  Figure 
  1. 
  

  

  Figure 
  3 
  

  

  Figure 
  

  

  li^nre 
  ^ 
  

  

  Diagrams 
  Ulustratjng 
  T. 
  J. 
  Lowiy's 
  Improvements 
  on 
  the 
  Beztant. 
  

  

  