254 



British and continental naturalists, and as analogy in the 

 case of other Irish mammals justified the view, he urged the 

 great probability of the race in question proving to be one 

 peculiar to Ireland. 



Mr. Ball exhibited specimens and drawings, and solicited 

 the co-operation of Members of the Academy, in effecting a 

 perfect elucidation of the subject, by collecting specimens 

 from the bogs of the country. 



Dr. Kane read an account of a substance which has 

 hitherto been confounded with white precipitate. It is 

 formed by precipitating in the cold, a solution of sal-alem- 

 broth by carbonate of potash, or by boiling true white pre- 

 cipitate in a strong solution of sal-ammoniac. The compo- 

 sition of this body is expressed by the formula Hgcl -|- n H3, 

 and Dr. Kane considers it as intermediate between true 

 white precipitate and sal-ammoniac. 



This substance was noticed independently by Professor 

 Woehler, as being found in commerce under the name of 

 white precipitate. He, however, recommended it to the at- 

 tention of chemists without analyzing it. 



Rev. H. Lloyd, V. P., read a *' Note of Observations 

 made during the remarkable Aurora of the 19th inst." 



Mr. Lloyd commenced by stating, that the approach of 

 this beautiful phenomenon was indicated in Dublin, at an 

 early hour, by the disturbance of the magnets in the Ob- 

 servatory. At five o'clock, both magnetometers testified the 

 setting in of what Humboldt calls a " magnetical hurricane ;" 

 the disturbance in declination amounting, in the course of a 

 quarter of an hour, to 20.7 minutes, while the corresponding 

 change in the intensity/ of the horizontal component of the 

 magnetic force, was 0092, or nearly the one-hundredth part 

 of the whole. 



Shortly before 10 o'clock, a broad and brilliant arch was 



