Education of Defectives in the Public Schools. By Meta L. Anderson. Yonkers, N. Y.: World Book Company, 1917. Pp. xvii+104. Miss Anderson has set forth, in a thoroughly practical way, the methods used by teachers of defectives in the more progressive American cities. A serious weakness in her book, is that she ignores nearly everything that has been accomplished outside of Newark, N. J., Vinela...

We show that uniform families of ACC circuits of subexponential size cannot compute the permanent function. This also implies similar lower bounds for certain sets in PP. This is one of the very few examples of a lower bound in circuit complexity where the uniformity condition is essential; it is still unknown if there is any set in Ntime (2 n O(1) ) that does not have nonuniform ACC circuits.

Holiday in Mexico: Critical Refl ections on Tourism and Tourist Encounters. Edited by Dina Berger and Andrew Grant Wood. Durham, NC: Duke University Press, 2010. Pp. xv + 393. $24.95 paper. $89.95 cloth. Economies of Desire: Sex and Tourism in Cuba and the Dominican Republic. By Amalia L. Cabezas. Philadelphia: Temple University Press, 2009. Pp. xii + 218. $24.95 paper. Negotiating Paradise: U....

We have measured the mean peculiar motions of 103 early-type galaxies in 7 clusters in the Perseus–Pisces (PP) ridge or PP background, and a further 249 such galaxies in 9 calibrating clusters from the literature, using the inverse Fundamental Plane relation. This relation is found to have a distance error of 20% per galaxy. None of the 6 clusters in the PP ridge has a significant motion with r...

1. J. C. Butcher. "On a Conjecture Concerning a Set of Sequences Satisfying The Fibonacci Difference Equation/ The Fibonacci Quarterly 16 (1978):8183. 2. M. D. Hendy, "Stolarskys Distribution of Positive Integers." The Fibonacci Quarterly 16 (1978)2 70-80. 3. V. E. HoggattsJr. Fibonacci and Lucas Numbers* Boston: Houghton Mifflin9 1969. Pp. 34-35. 4. K. Stolarsky. "A Set of Generalized Fibonacc...