Chase.] 



530 



[1868. 



TABLE IX. 



Solar hourly Barometric means and Amount of heavy Bains 

 (.25 inch or more per hour) at Bhiladeljyhia, 1840-5. 



TABLE X. 



Monthly Bain/alls. 



The means Q:*. 528) furnish a basis for interesting comparisons 

 with the similarly deduced magnetic and liarometric means (ante 

 J). 3T1). Considered in connection with the Tables (I. — XL) 

 and the normal curves (Figs. 1 — G) they apjiear to justify the 

 following inferences, most of which, though specially deduced, 

 are presumptively general. 



1. The tidal rainfall, like the ocean tides, is affected by " estab- 

 lishments," which depend upon ocean currents, mountain ranges, 

 prevailing winds, and other climatic influences. 



2. It is also, like the ocean tides, more marked in low, than 

 in high latitudes. 



