The following works embodying researches coming within the scope of this Commission have been published since the last meeting of the Union:

1. “Recherches sur la polarisation de la lumière des planètes et de quelques substances terrestres,” by B. Lyot, Annales de l’Observatoire de Paris, Section de Meudon, 3, Fase. i. Characteristic curves are found representing the fraction of light polarized in the case of the Moon and several of the planets for the angles Sun-Moon or planet-Earth and compared with curves obtained in the laboratory for light reflected by a number of terrestrial substances. Some of the conclusions arrived at are referred to in the notes below.

2. La Planète Mars 1656-1929, by E. M. Antoniadi. This is based mainly on the author’s own telescopic observations with the 0.83 m. Meudon refractor in 1909 and the following years, and contains the author’s conclusions therefrom. The work of numerous earlier and contemporary observers is also summarized and compared with the Meudon observations.

3. The Moon, by W. Goodacre. Contains a description of the lunar surface formations, numerous drawings, charts and photographs, and the author’s revised Map of the Moon in 25 sections.

4. “Ricerche Polarigrafiche sui Pianeti. La Polarizzazione sul Disco di Giove,” by M. Maggini, Mem. della Soc. Astron. Italiana, 4.

5. La Constitution des Comètes, by F. Baldet. Paris, Hermann et Cie. 1930.

6. “ Halley’s Comet in its Apparition of 1909-1911,” by Nicholas T. Bobrovnikoff, Pub. of the Lick Observatory, 17, pt 11, 1931.

7. “Absorptionsspektren und Atmosphären der grossen Planeten,” by R. Wildt, Nach, von der Gesellschaft der Wissenschaften zu Göttingen, Math.-Phys. Klasse, 1932.