346 



TRANSACTIONS OF THE 



8th. Do storms become more widely extended from 

 the place of their commencement, as they travel east- 

 wardly, or in any other direction ? 



9th. Does the depression of the barometer keep pace 

 with the motion of the storm, accompanying it through- 

 out its course ? 



10th. In case of a violent tornado, is the depression of 

 the barometer very sudden and very great at the moment 

 when the tornado passes; and at the moment of great- 

 est depression is there no rain, the drops being carried 

 upwards by the rapidly ascending air? 



11th. Do violent tornadoes never occur only when the 

 dew-point is very high, and are they always accompa- 

 nied by violent rain or hail, more copious in the borders 

 of the tornado than in the centre? 



12th. In narrow storms or hard showers, does the air 

 at the surface of the earth and at the upper part of the 

 cloud move outwardly from the centre of the shower, 

 while at the same time at the lower part of the cloud it 

 moves tow^ards the centre of the shower? 



13th. Are there not sometimes two veins of hail at no 

 great distance apart, both near the borders of the storm? 



14th. Are hail storms always of very limited extent in 

 width, occurring only when the dew-point is high; and 

 more frequently in the afternoon than any other part of 

 the day? 



If these and such questions, plainly indicated by the 

 theory, should be answered in the affirmative by obser- 

 vation, the theory will be established on a foundation 

 whicb cannot be shaken. I hope I have shown plausi- 

 bility enough in the theory, to excite the interest of ob- 

 servers to inquire of nature whether these things are so. 



