^IfA Antidote to Corrosive Sublimate. 



he found upon examination that this person's hearing ter- 

 minated at a note four octaves above the middle E of the 

 piano-forte. Other instances were then referred to, of the 

 insensibiHty of certain persons to various acute sounds, 

 such as the chirping of the grasshopper, crickets, and spar- 

 rows, and especially the squeaking of the bat, the existence of 

 which is unknown in many individuals from its being inau- 

 dible to them. The pitch of the sound was stated to be 

 aibout five octaves above the middle E. The author fixed 

 the limits of his own hearing at six octaves above the same 

 note. The range of human hearing includes upwards of 

 nine octaves, the whole of which are distinctly audible to 

 most ears, although the vibration of the acuter sounds is 

 six or seven hundred times more frequent than that of the 

 lower. The author concluded by observing that it is very 

 probable that other animals are so organized as to be able to 

 distinguish sounds still more acute and of course more in- 

 audible by human ears, and thus to possess what may be 

 considered a new sense. — Thomson'' s An. 



15. Prisons, 



A Society for the Amelioration of Prisons has been es- 

 tablished at St. Petersburg ; Prince Galitzin is the presi- 

 dent. — Rev. Ency. 



16. Pompeia. 



A shower of ashes having fallen recently on the ruins of 

 Pompeia, M. De Gimbernat, a Spanish naturahst, compared 

 its composition with that of the substance under which the 

 city was anciently buried. He did not find the least resem- 

 blance between them ; whence it appears doubtful wheth- 

 er the ruin of that city was occasioned by a shower of ash- 

 es. The same philosopher observed that some days after 

 the eruption, the crater of Vesuvius was covered with crys- 

 tah'ne marine salt. — Ibid. 



17. .Antidote to Corrosive Sublimate. 



M. Taddei professor of Pharmacy in the hospital of San- 

 ta Marie Kuova, of Florence has ascertained that the glu- 



