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Vol. II. No. 33, February 19, 1881. 



CONTENTS. 



Professor Watson's Successor, (Edit.); Edison and his Light (Edit.); The Americai Chemical Society ; The German Chemical 

 Society; The New York Microscopical Society ; The Society of Telegraph Engineers (England); Further Notes on the Brain of 

 the Iguana and other S turopsida?, by Edward U. Spitzka ; Recent Progress of Scienc \ by Samuel Fleming; Cause of the Blue 

 Color ot Certain Waters, by John Le Conte; On the Imnortanci of Entomological Stulics, by J. A. Dinner; Note on Dr. 

 Henry Draper's Photograph of the Nebula in Otion, by Mr. Ranyard and others; Astronomical Memoranda, by W. C. W.; 

 Books Received, Dr. Fleming's Classification ol Science, by B. D.; Announcements. 



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