Abstract
SOME of the full-page photographic plates in this volume of Knowledge are very fine. Among the subjects are several brilliant photographs of star clusters and nebulæ, taken by Dr. Isaac Roberts, constellation figures on Greek coins, lunar photographs, life-history of a sunspot group, spectra of Nova Persei, and the solar corona of May 18, 1901. Mr. E. W. Maunder has a series of articles on constellation studies, in which he deals largely with the poetical aspects of the sky; Dr. Vaughan Cornish has four articles on the sizes of ocean waves; Mr. G. H. Carpenter describes insects of the sea; Mr. R. Lydekker writes on a number of subjects of zoological interest; Mr. H. F.Witherby on ornithological experiences in the Soudan; and Mr. R. Lloyd Praeger on flowering plants. There are numerous other articles of an instructive character.
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