312 



METEOROLOGY. 



of the wind ; the rain ga«;e, the commencement and end of showers ; 

 and the wind vane, the continually shifting currents of wind. This 

 is effected by a pencil kept applied by a spring to a piece of paper on 

 the dial previously alluded to, and as by the clock-work the dial, and 

 the two previously mentioned slips of paper move at the rate of one 

 inch per hour, so it is easy to determine, in the most accurate manner, 

 the direction and force of the wind at any hour of the day, or any 



ssiallwood's observatory. 



