A UXA NOME TER . ■] 5 7 



piece of paper // is so alTixed to the cylinder C that it shows no creases of any 

 kind : this paper must be as smooth as possible on its outer surface, so as not 

 to hinder the movement of the apex of the indicator which is to mark on it. 



Before the cylinder is fixed on to the clockwork, the attached pajier is moved to and 

 fro over the smoky flame of an oil lamp, until the smooth surface of the paper is 

 completely covered with soot. After fixing the cylinder, the indicator z, the apex of 



