404 



Resolved, — That the thanks of the Academy be given 

 to Sir Richard O'Donel, Bart., for his valuable deposit, and 

 that the custody of it be accepted by the Academy on the 

 terms proposed by him. 



Sir Wm. Betham gave an account of the Caah. 



Professor Kane read a notice of some recent Determina- 

 tions of the Heat developed during the Formation of certain 

 Compounds of Chlorine, by Dr. Andrews. 



The present results were obtained by a similar method 

 to that described in the last volume of the Transactions of 

 the Academy. The chlorine, however, was employed in the 

 dry state, and the compounds being formed without the pre- 

 sence of water, the heat of combination was deduced from a 

 single direct experiment. In the case of potassium, an im- 

 portant modification of the apparatus was required, which 

 will be described when the full details of the experiments 

 are communicated to the Academy. The numbers in the first 

 column are the immediate results of experiments, and ex- 

 press, in degrees of Fahrenheit's scale, the heat produced 

 during each reaction, in reference to the chlorine as unit, 

 that is, the degrees through which a weight of water equal 

 to that of the combining chlorine would be raised by the heat 

 developed in the formation of each compound. The num- 

 bers in the second column express the same heat, referred 

 to the combining metal as unit, and are deduced by calcula- 

 tion from the others. 



Dr. Allman read a notice of a new species of Linaria. 

 This plant was discovered growing on the banks of the 

 River Bandon, and Dr. Allman considered it sufficiently dis- 



