IN NATURE for January 7, 1904, a list was given of the awards made by the Carnegie trustees for the prosecution of inquiries in various scientific directions. The third year book, just published by the board of trustees, contains reports upon most of these researches, but the time is far too short to gather in the full harvest, which may hereafter be expected, from so lavish and, presumably, judicious expenditure. There is abundant evidence that many well-known men, engaged in every department of science, have been enabled to attack problems which must otherwise have been neglected, or pursued with inadequate material and less energy. Beyond this general fact, the present volume does not, in most instances, enable us to estimate the results. The balance sheet attached shows that the trust is in a very flourishing condition, and that 267,000 dollars have been provided for inquiries, which the management discuss under the three heads of large, special, and minor grants.