1S69.] -^^^ [Chase. 



LUKAR DxVILY RAIN AT PROVIDENCE, COBIIAM, CHISWICK AKD TORONTO. 

 Fall at Providence. Pi'ovidence Normals. 



The foregoing Normals not only corroborate the inferences in my pre- 

 vious papers, but they also show that the eastward movement of storm 

 waves, which has been so clearly clemonstratecl by Prof. Henry, prevails 

 to some extent in the Eastern, as well as in the Western Continent. The 

 Toronto observations cover so short a period, that their independent value 

 in determining the form of the lunar monthly raincurve is small, but 

 when compared with the observations at Philadelphia and Providence, 

 they show that a similar lunar influence is felt at each station, modified 

 by the local establishments. 



An extensive investigation and comparison of observations may be ne- 

 cessary, to determine whether the direction of storm-progression in Eng- 

 land is determined, either wholly or in part, by the trend of the Doffrafield 

 Mts., or is owing mainly to the earth's rotation. In consequence of 

 Alpine influences I should look for indications in Central Europe, of a 

 subordinate system of storm-waves, moving nearly in the line of the me- 

 ridian, or at right angles with the general system of the globe. 



