10 



Experimental Illustrations of the radiating and absorbing 

 Powers of Surf aces for Heat, &c. 



Replies to a Circular in relation to the Occurrence of an 

 tmusua I Meteoric Display on the ISth of November, 1834. 



Notice of Experiments on Electricity developed by Mag- 

 netism. 



Experiments on the Efficacy of Perkins's Steam Boilers, 

 or Circtdators, 



On the alleged Influence of Colour on the Radiation of 

 non-luminous Heat, 



Safety Apparatus for Steam Boilers. 



Observations on the Disturbance in the Direction of the 

 horizontal Needle during the Aurora of July \Oth, 1833. 



Report of Experiments on the Navigation of the Chesa- 

 pealce and Delaware Canal by Steam. 



