is unnecessary to dwell further upon it. We now proceed to the second part of our investigation, namely, to consider the distribution of the rainfall of the last decade, during which we have nearly four hundred perfect sets of observations. As each set of observations comprises more than a thousand entries, and the following Table contains the result of nearly half a million observations, it is probable that it contains some slight percentage of error, but we have no suspicion of the existence of any which appreciably affect the results.

The head-lines of the following Table sufficiently explain its contents.

TABLE V.-Mean Rainfall at 325 Stations during the ten years 1860–69.