156 THE STORMS OF THE WINTER 1865-6. 



2. Eead the thermometer every hour when the barometer falls 

 rapidly, and every half Jiour when it ceases to fall and begins to rise. The 

 temperature begins to fall usually when the barometer begins to rise. 



3. Watch the wind while the barometer falls, and especially when 

 at its lowest point. It will be found to veer suddenly from S.W. or W. 

 to N.W. when the storm is about its height. 



4. The mercury in the tube of the barometer will be found to rise 

 and fall with every strong gust of wind during the storm. Note the hour 

 Avhen the oscillation commences, when it is greatest, and when it ceases. 



5. Note the exact local time when the barometer reaches its lowest 

 point, when it begins to rise; also when the temperature ceases to rise, 

 when it reaches its highest reading, and when it begins to fall. 



The times when the wind passes the S.W., W., and N.W.W. points 

 should also be noted. 



6. If in addition to the above records, the observer wiU venture 

 out in the wildest hour and take the pressure or velocity of the wind by 

 means of a small portable wind-guage, he will possess a valuable record of 

 a most destructive and interesting phenomenon. 



7. The rainfall should be noted while the storm is rising, and also 

 the quantity that falls dm-ing its height, and as it subsides, more rain 

 usually falls at the two latter periods. 



8. An hour's watching of the heavy gusts pecivliar to these 

 westerly winds, especially if the intervals of time between be noted, will 

 give a good idea of this characteristic. The easterly winds blow very 

 steadily, and often their hourly velocity has been observed to remain 

 perfectly constant for more than a day. 



9. Sometimes a lull occiu's before the wind reaches its greatest 

 force. 



The Phenomena maj- be briefly stated under this head. — 

 f Barometer falling: — 

 Thermometer rising; — 



Wind rising higher every hour, with long gusts: — 

 Cloud driving along the sky. — 

 Some rain. 



Wind S., SW. or W. 

 Barometer violently agitated: — 



1. Gathering 

 of the Storm. 



