THIS second talk by Professor Burt concludes his contribution to the series that began last summer, and the remaining four talks will be given by Dr. Crichton-Miller and Dr. Potts. This evening the subject discussed will be one of great interest to many parents, and-in these days of youthful precocity-to quite a lot of adolescents ; how far it is possible to seek the aid of science as a guide in that ever-recurring difficulty, the choice of a career.