THE Skalnate Pleso Atlas of the Heavens is named after the new astrophysical observatory at Skalnate Pleso (Rocky Lake) in the High Tatra Mountains of Czechslovakia, the director of which, Dr. Antonin Becvar planned the work and, with the aid of a devoted and enthusiastic band of collabor-ators carried it through in less than a year. The Atlas was published in Prague in 1948, but shortage of paper limited the number of copies that could be printed. The present edition, published in the United States from duplicate negatives, will make the Atlas available to all who require it. Skalnate Pleso Atlas of the Heavens 1950.0 By A. Becvar. Pp. ii + 16 charts (18 in. × 25 in.). (Cambridge, Mass.: Sky Publishing Corporation, 1949.) 5 dollars. Mappa Coelestis Nova Containing all Stars brighter than 5.0 Visual Magnitude classified according to the Henry Draper Catalogue. (Cambridge, Mass.: Sky Publishing Corporation, 1949.) 3.50 dollars.