146 



65-66 Fahrenheit, under the pressure of 2975 inches of mercury 

 at the freezing-point of water (t = 18- 7 C., b = 755 mm -G4), or in 

 air for which 10 + log A = 7'07835, in terms of the commercial 

 pound W of the same density as the lost standard troy pound. 



II. " On the Determination of Unknown Functions which are 

 involved under Definite Integrals." By J. GOMES DE 

 SOUZA, Professor of Mathematics in the Military Academy 

 of Rio Janeiro. Communicated by Professor STOKES, 

 Sec. R.S. 



The author, after referring to a previous memoir on the same sub- 

 ject, presented by him to the French Academy, proposes to himself 



