Tms book contains twelve talks broadcast by the B.B.C. in their Horne Service during the winter of 1943-44. The series was called "Science at Your Service," and its object was to show the inftuence of science on everyday life. Each speaker dealt with some subject of practical importance with which he was speciaJly acquainted, such as textiles, fish, or tunnels. Each talked about the difficulties of providing what people need, and explained how some of tllese difficulties have been overcome, and how the rest are being tackled.