JOURNAL 
OF THE 
UOYAL AORICULTURAL SOCIETY 
OF ENGLAND. 
XXII. — On the Amount and Composition of the Rain and 
Drainaqe-Watcrs collected at Rothamsted. By J. B. La WES, 
LL.D.,"f.R.S., F.C.S., J. H. Gilbert, Ph.D., F.R.S., F.C.S., 
and R. VVaeington, F.C.S. ; 
Part II. The Amount and Composition op the Drainage- 
Waters FROBi Unmanured Fallow Land (continued from 
page 279 *). 
2. The Measured Drainage, and the Evaporation (^continued). — 
Having now disposed of the preliminary questions belonging 
to the subject, we may proceed to consider the general facts 
exhibited by the ten years' drainage experiments. 
In the following Table (p. 312) the rainfall and drainage of 
each of the summer and winter periods during the past ten years 
are shown ; the rainfall and drainage for each twelve months — 
October 1 to September 30 — are also given. This period of 
twelve months we may, for our present purpose, call the 
" Drainage Year ;" and our mode of record will thus agree 
with the division into Civil-year periods adopted by Mr. Greaves 
and Mr. Evans. The whole of the seasons are arranged in the 
table in the order of their respective rainfall ; the influence of 
varying amounts of rain is thus clearly shown. The amounts 
of drainage given are the mean of the results yielded by the 
three drain-gauges, 20, 40, and 60 inches in depth. 
The range of rainfall during the ten years of the experiment 
is seen to have been enormous. We have a consecutive twelve 
* In the preceding number of this ' Journal ' will be found the Fikst Part of 
the present Paper, treating of '' The Amount and Composition of the Rainfall;" 
also a portion of the Second Part, now completed. Tlie former portion of the 
Second Part included (1) a description of the soil drain-gauges, and (2) an 
account of the amounts of monthly drainage obtained from 1870 to 1880. 
VOL. XVII. — S. S. Z 
