26 



PHYSICAL AND MATHEMATICAL SECTION. 



November 8th, 1860. 



Mr. Baxendell was elected a Vice-President of the Section, 

 in place of the late Mr. Long-. 



Mr. Baxendell read a Paper, '« On a System of Periodic 

 Disturbances of Atmospheric Pressure in Europe and Northern 

 Asia." 



[This Paper was afterwards read at the Ordinary Meeting 

 of the Society, on the 13th November.]— See Proceedings 

 No 5.] 



December 6th, 1860. 



Mr. George Mosley was elected Treasurer of the Section, 

 i n place of Mr. Baxendell. 



Mr. Atkinson read a Paper, entitled " Remarks on 

 Abnormal Disturbances of the Barometrical Column at certain 

 Seasons of the Year." 



Mr. Atkinson considers that all the movements in the 

 atmosphere of our earth, which have received the designation 

 of irregular^ are caused by the reflected or radiated heat of 

 the sun, and take place at a very moderate elevation, say 

 within five or six miles of the general surface level ; — and that 

 these apparently irregular movements or shiftings from place 

 to place of lighter and heavier air, causing oscillations in the 

 barometric column, are mainly if not wholly due to irregulari- 

 ties of the earth's surface. Had our earth been a globe 

 possessing a smooth surface of uniform texture and properties, 

 it seems clear that the atmosphere would have been acted 



