THERE are at the present day many earnest students of sociology. It is only natural, therefore, that we should find societies for the investigation of sociological questions springing up. The publications of the Instituts Solway for 1906 are already fairly bulky, though as yet we have the output for the first half of the year only. There are seven “fascicules,” the largest of which contains three hundred pages. One, possibly two, of the papers contained in them, though not to a great extent original, may be described as distinctly able. The aim of the first paper (by E. Solway) is to prove that sociology must be founded on biology. Of course, if the nature of a society is to be investigated, it is well, as a preliminary, to learn all that is to be known about the individuals of which it is composed. It is well to make this clear at the outset, but it may be doubted whether anything is gained by arguing this out elaborately and mathematically.