126 



changes in solar activity, and consequently in the magnetic 

 condition of the earth, produced corresponding changes in 

 the directions and velocities of the great currents of the 

 atmosphere, and in the distribution of barometric pressure, 

 temperature, and rainfall. It is therefore evidently very 

 desirable to discuss observations made at stations in various 

 parts of the globe with reference to the variations which 

 take place in solar activity, and thus to determine for each 

 station the nature of the changes which take place in the 

 relations between the several meteorological elements during 

 a solar spot period. 



February 27th, 1872. 



E. W. BiNNEY, F.KS, F.G.S, Vice-President of the Section, 



in the Chair. 



"Results of Observations, registered at Eccles, on the 

 Direction and Range of the Wind for 1869, as made by an 

 Automatic Anemometer for Pressure and Direction," by 

 Thomas Mackereth, F.R.A.S., F.M.S. 



The following anemometric results have been obtained 

 from an instrument made by Mr. William Oxley, of Man- 

 chester, and which has been exhibited and explained at a 

 meeting of this Section of the Society. This instrument 

 records by means of a pencil the range which the wind has 

 made through the degrees of the compass in 24 hours, and 

 the exact point or degree at which the greatest pressure 

 took place, as well as the amount in pounds of such pressure. 

 From these automatic registrations the mean or general 

 direction of the wind for any day is easily obtained, as well 

 as the number of degrees of the compass through which the 

 wind may have veered. The results presented below are 

 for one year onl}^, but it is my intention, as early as possible, 

 to present to the Section the results of the subsequent 



