60 
GREELY. 
of an inch in rainfall, the plus and minus departures from 
the average daily rainfall for the year are charted for the 
separate months. In September the excess for each day 
amounts to .157 inch, while in April the deficiency is equiv¬ 
alent to .055 inch. As may be observed, the salient features 
are the very great excesses during September and October, 
and the decided deficiencies from December until their cul¬ 
mination in April. It is further to he observed that plus 
values obtain only during September, October, August, and 
June, in the order named, the latter doubtless resulting from 
the intrusion of the Trans-Mississippi type, which will be 
alluded to later. 
At first sight one might naturally attribute the excessive 
mean rainfall of September to the advent of West India 
hurricanes; but while the potent effect of these violent storms 
as regards the autumnal precipitation is evident in certain 
years, yet a closer examination of the data shows that such 
abnormal distribution of the rainfall is not local but is quite 
general along the entire coast of the Gulf of Mexico. 
Moreover, an examination of the storm paths from 1874 
to 1890 indicates that over three-fourths of the low-area 
storms bringing precipitation to Texas originate on land. 
This rain-regime, then, of the coast region of Texas is not 
strictly local, but pertains to the whole Gulf of Mexico, and 
does not depend on hurricanes. 
In the Panhandle, and thence southward over the central 
meridian of Texas, the month of greatest precipitation falls 
in the early summer (May), and the least in midwinter 
(January), thus conforming to the Trans-Mississippi type, 
represented best by Omaha, where over one-sixth of the 
annual precipitation falls in June and only about one- 
fiftieth in January. 
In Texas the Fort Elliott curve represents best the Trans- 
Mississippi type with its very prominent excess of .077 inch 
during May, and the decided and persistent deficiencies from 
November to March, inclusive, the values of the daily rain¬ 
fall during these months not differing in the extreme more 
