LECTURES AND MEETINGS OF SOCIETIES. 269 



PAPERS ENTERED TO BE READ AT THE MEETING OF THE NATIONAL ACADEMY OF 



SCIENCES IN APRIL, 1896. 



I. The Geological Efficacy of Alkali Carbonate Solutions. E. W. Hilgard. 

 II. On the Color Relations of Atoms, Ions, and Molecules. M. Carey Lea. 



III. On the Characters of the Otoccelida:". Prof. E. D. Cope. 



IV. Exhibition of a Linkage whose Motion Shows the Laws of Refraction of 



Light. A. M. Mayer. 

 V. Location in Paris of the Dwelling of Mains, in which he made the Dis- 

 covery of the Polarization of Light and Reflection. A. M. Mayer. 

 VI. (1) On Experiments showing that the X-Rays can not be Polarized by 

 passing through Herapathite. 

 (3) The Density of Herapathite. 



(3) Formula? of Transmission of the X-Rays through Glass, Tourmaline 

 and Herapathite. A. M. Mayer. 

 VII. On the X-Rays from a Statical Current Produced by a Rapidly Revolv- 

 ing Leather Belt. W. A. Rogers and Frederick Brown. 

 VIII. Biographical Memoir of James Edward Oliver. G. W. Hill. 

 IX. Biographical Memoir of Charles Henry Davis. C. H. Davis. 

 X. Biographical Memoir of George Engelmann. Dr. C. A. White. 

 XL Legislation Relating to Standards. T. C. Mendenhall. 

 XII. On the Determination of the Coefficient of Expansion of Jessop's Steel, 

 between the limits 0' and 64' C. , by the Interferential Method. E. W. 

 Morley and W. A. Rogers. 



XIII. On the separate Measurement, by the Interferential Method, of the 



Heating Effect of Pure Radiations and of an Envelope of Heated Air. 

 W. A. Rogers. 



XIV. On the Logic of Quantity. C. S. Peirce. 



XV. Judgment in Sensation and Perception. Maj. J. W. Powell. 

 XVI. The Variability in Fermenting Power of the Colon Bacillus under Dif- 

 ferent Conditions. A. W. Peckhani. 

 XVII. Experiments on the Reflection of the Rcmtgen Rays. O. N. Rood. 

 XVIII. Notes on Rontgen Rays. Prof. H. A. Rowland. 

 XIX. Some Studies in Chemical Equilibrium. Ira Remsen. 

 XX. The Decomposition of Diazo-compounds by Alcohol. Ira Remsen. 

 XXI. On Double Hahdes containing Organic Bases. Ira Remsen. 

 XXII. Results of Researches of Forty Binary Stars. T. J. J. See. 



XXIII. On a Remarkable New Family of Deep-sea Cephalopoda and its bearing 



on Molluscan Morphology. Prof. A. E. Verrill. 



XXIV. The Question of the Molliiscan Archetype, or Archi-mollusk. Prof. 



A. E. Verrill. 

 XXV. On some points in the Morphology and Phylogeny of the Gastropoda. 



Prof. A. E. Verrill. 

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

 XXVII. The Relative Permeability of Magnesium and Aluminum to the Rontgen 



Rays. A.W.Wright. 

 XXVIII. The State of Carbo-dioxide at the Critical Temperature. C Barns. 

 XXIX. The Motion of a Submerged Thread of Mercury. C. Barus. 

 XXX. On a Method of Obtaining Variable Capillary Apertures of Specified 



Diameter. C. Barus. 

 XXXI. On a New Type of Telescope Free from Secondary Color. C. S. Hastings. 

 XXXII. The Olindiadai and other Medusae. W. K. Brooks. 



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



XXXIV. Anatomy of Yoldia. W. K. Brooks and Gilman Drew. 



XXXV. On the Pithecanthrojms erectus from the Tertiary of Java. Prof. O. C. 

 Marsh. 



