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DR WALLACE ON A FUNCTIONAL EQUATION. 



Table of Corresponding Values of x, the Ahcissa, or Amplitude, f (x) ; the Ordinate : 

 F (x), the Arc of a Catenary ; and p, the Angle which a tangent to the curve 

 at the top of the ordinate makes with the horizontal axis : The Parameter 

 being the unit of the numbers by which they are expressed. 



Table I. — The Amphtude between x = 0, and x = *.01. 



