Pbbeuaet 9, 1883. 



SCIENCE. 



Oct. 19, 1882. midnight, a.m. 





fti a 



» a 



Barometric curve. 



° Velocity of wind, as t 



f" i" + Relative moisture. 

 .-.-.- — >««Tbermometric curve. 



I by the anemometer. 



Condition of sky, and direction of cloude. 



The arrows indicate not only the direction of the clouds, but also their velocity, represented by the barbs, six marking a hnrri- 

 iane force ; the zigzag arrows indicate lightnings, and the point of the horizon where they were observed : the empty circles indicate 

 I sky completely hidden. *^ "^ 



The heavy vertical black lines at the bottom of the chart indicate the amount of raiu. 



