This paper contains the results of all available evaporation records, not only in the United States and outlying possessions, but also in foreign countries, reduced to reservoir surface evaporation by means of coefficients which are stated for each record. These results are given in summarized form, together with records of temperature, wind velocity, and relative humidity, as far as available. A total of 210 evaporation records are presented. After the summary the relative effect of temperature, wind velocity, and relative humidity is shown by comparison between pairs of records in which two factors are the same and the third is widely different.