METEOROLOGY OF 1 897 
I r 
Pressure, Millimeters. Pressure, Millimeters. 
§16. On the diagram, Figure 6, the vertical scale indi- 
cates pressure, the horizontal scale, time. I he heavier lines 
show periods of two minutes and the smaller oik's 30 sec- 
onds intervals. 
§17. Sheet No. i, was placed on the instrument during 
a heavy wind from the west — known as Chinook — and the 
clock work started at 10:30 a. m. The clock work revolved 
five times before the sheet was removed, one revolution not 
recording owing to the exhaustion of ink in the pen. The 
