494 Scientific Intelligence. 



"W. A. Rogers and Frederick Brown : On the X-Rays from a statical current 

 produced by a rapidly revolving leather belt. 



G. W. Hill : Biographical memoir of James Edward Oliver. 



C. H. Davis : Biographical memoir of Charles Henry Davis. 



C. A. White: Biographical memoir of George Engelmann. 



T. C. Mendenhall : Legislation relating to standards. 



E. W. Morley and W. A. Rogers : On the determination of the coefficient 

 of expansion of Jessop's steel, between the limits of 0° and 64° 0., by the inter- 

 ferential method. On the separate measurement, by the interferential method, of 

 the heating effect of pure radiations and of an envelope of heated air. 



C. S. Pfirce : On the logic of quantity. 



J. W. Powell : Judgment in sensation and perception. 



A. W. Peckham : The variability in fermenting power of the colon bacillus 

 under different conditions. 



0. N. Rood: Experiments on the reflections of the Rontgen rays. 



H. A. Rowland: Notes on Rontgen rays. 



Ira Remsen: Some studies in chemical equilibrium. The decomposition of 

 diazo-compounds by alcohol. On double halides containing organic bases. 



T. J. J. See: Results of researches of forty binary stars. 



A. E. Verrill : On a remarkable new family of deep-sea Cephalopoda and its 

 bearing on molluscan morphology. The question of the molluscan Archetype, or 

 Archi-mollusk. On some points in the morphology and phylogeny of the Gastro- 

 poda. 



A. A. Michelson and S. W. Stratton : Source of X-Rays. 



A. "W. Wright: The relative permeability of magnesium and aluminum to the 

 Rontgen rays. 



C. Barus: The state of carbon dioxide at the critical temperature. The motion 

 of a submerged thread of mercury. On a method of obtaining variable capillary 

 apertures of specified diameter. 



C. S. Hastings: On a new type of telescope free from secondary color. 



W. K. Brooks : The Olindiadre and other Medusae. 



W. K. Brooks and George Lefevre: Budding in Perophora. 



TV. K. Brooks and Gilman Drew: Anatomy of Yoldia. 



0. C. Marsh: On the Pithecanthropus erectus from the Tertiary of Java. 



2. New England Meteorological Society. — A circular from the 

 Secretary, Wm. M. Davis, bears the information that at the last, 

 thirty-sixth, regular meeting held in Boston on the 25th of April, 

 the Society dissolved by vote of its members. The undistributed 

 copies of the Society's investigations were presented to the Astro- 

 nomical Observatory of Harvard College, subject to the disposal 

 of the Director of the Observatory, who will hereafter receive all 

 publications addressed to the Society. 



Obituary. 



Dr. Carl Nicolaus Adalbert Krtteger, Director of the 

 Observatory at Kiel and editor of the latest forty volumes of the 

 Astronomische Nachrichten, died at Kiel, April 21st, in the 64th 

 year of his age. 



