473 



of superheated steam taken at different intervals of temperature from 

 the maximum temperature of saturation. 



Hence it appears, that as the steam becomes more and more super- 

 heated, the coefficient of expansion approaches that of a perfect gas. 

 The authors hope that these experiments may be continued, and that 

 the results obtained at greatly increased pressures will prove as 

 important as those already arrived at. 



May 24, 1860. 

 Sir BENJAMIN C. BRODIE, Bart., President, in the Chair. 



In accordance with Notice given at the last Meeting, the Right 

 Hon. Earl de Grey and Ripon was proposed for election and 

 immediate ballot ; and the ballot having been taken, his Lordship 

 was declared duly elected. 



Alexander Dallas Bache, Hermann Helmholtz, Albert Kolliker, 

 and Philippe Edouard Poulletier de Verneuil were severally balloted 

 for, and declared duly elected Foreign Members of the Society. 



