368 Acoustics — Electricity/ — Galvanism — Meteorology, 



ACOUSTICS. 



3. Velocity of Sound in the Arctic Reg-ions hy Captain Parri/s observa* 

 tions. — In a valuable paper by Professor Moll of Utrecht, (Phil. Trans- 

 1828, p. 103.) containing a reduction of Captain Parry's experiments on 

 the velocity of Sound at Port Bowen, the following table of results is 

 given : — 



Velocity of sound in inches. 

 Captain Parry and Lieutenant Foster, 333.15 



Do. another series, - - - 333.71 



Do. another series, _ _ . 332.85 



Professor Moll and Von Beck, - 332.05 



M. Starapfer and Myrbach in Germany, 333,25 



Messrs Arago, IMathieu, and Biot in France, 331.05 

 M. Benzenberg, Germany, - - 333.70 



MM. Epinozd and Bauza in Chili, - 356.14 



Dr O. Gregory in England, - - 335.14 



French Academicians, - - 332.93 



ELECTRICITY. 



4. On the influence of Electricity on the emanation of Odours. — In a 

 late number of the Antologia of Florence, M. William Libri has announced 

 the following curious fact. ''^When a continued current of electricity tra- 

 verses an odoriferous body, camphor, for example, the odour of this body 

 becomes weaker and weaker, and finally disappears entirely. When this 

 happens, remove the body from all electrical influence, and put it in com- 

 munication with the ground, and it will continue without odour for some 

 time. The camphor will afterwards recover its properties gradually but 

 slowly." It would appear from a note in the Ann. de Chim. that difficul- 

 ties have occurred in the repetition of this experiment. 



GALVANISM. 



5. M. Becquerel on the temperature of conducting^ wires. — M. Becque- 

 rel has discovered that the temperature of a conducting wire communicat- 

 ing with the two poles of a pile, increases from each of its extremities, and 

 constantly reaches its maximum in the middle of the wire. 



METEOROLOGY. 



6. Mass of Meteoric Iron found in France. — On the 13th October, M. 

 Hericart de Thury read to the Institute a notice of a mass of meteoric iron 

 existing at Caille, in the department of the Var. In August last, Mr 

 Brard sent from Frejus a specimen of the mass in question, with respect 

 to the origin of which he did not decide. The examination made by the 

 author caused him to suspect that it might be meteoric iron, and he there- 

 fore wrote to M. Brard, to beg that he would go to the place, in order to 

 determine the nature of the mountain on which it was discovered ; to ex- 

 amine the mass of supposed meteoric iron ; and to collect from the inhabi- 

 tants all the information which they could give him. The following is 

 extracted from the account given by Mr Brard : — The mass of iron which 



