Fibonacci Numbers, by N.N. Vorob'ev. Popular Lectures in Mathematics, Volume 2. Pergamon Press, London, 1961. 66 + ii pages. 10 sh. = $1. 75. - Some Applications of Mechanics to Mathematics, by V. A. Uspenskii. Popular Lectures in Mathematics, Volume 3. Pergamon Press, London, 1961. 58 + i pages. 10 sh. =$1.75. - Inequalities, by P. P. Korovkin. Popular Lectures in Mathematics, Volume 6. Pergamon Press, London, 1961. 60 + i pages. 10 sh. = $1.75.