1 882.] Proceedings of Scientific Societies. 535 



PROCEEDINGS OF SCIENTIFIC SOCIETIES. 



National Academy of Sciences. — The Academy met in the 



National Museum, Washington, on Tuesday, April 18, 1882, 



President W. B. Rogers in the chair. The papers of the first 



1. The course of the Gulf stream since the Cretaceous period, 

 Alexander Agassiz. 2. The Pre-cambrian rocks of Italy, T. 

 Sterry Hunt. 3. Notes on the geology of Yucatan, Alexander 

 Agassiz. 4. Desiccation of the Plateau of Mexico, Alexander 

 Agassiz. 5. On the brain of Phenacodus, E. D. Cope. 6. On 

 the young stages of a few osseous fishes. Alexander Agassiz. 7. 

 The affinities of Palaeocampa Meek and Worthen, as evidence of 

 the wide diversity of type in the earliest known Myriapods. S. 

 H. Scudder. 8. On the genesis and development of the Chirop- 

 terygium from the Ichthyopterygium, Theodore Gill. 



Wednesday, April 19, 1882. — 9. Preliminary notice of a new 

 Dividing Engine, H. A. Rowland, jo. On photographs of the 

 spectrum of the nebula in Orion, Henry Draper. 1 1. Theory of 

 concave gratings, H. A. Rowland. 12. On the influence of time 

 on the change in the resistance of the carbon disk of Edison's 

 Tasimeter, T. C. Mendenhall, presented by G. F. Barker. 13. 

 Note on a special form of secondary battery or electric accumu- 

 lator, Wolcott Gibbs. 14. Researches on complex inorganic 

 acids (continued). Wolcott Gibbs. 15. Biographical notice of 

 Professor John W. Draper, G. F. Barker. 16. Some discoveries 

 that enhance the value of the cotton and orange crops, C. V. 



• 2 — 17. The relation of rain-areas to 

 Loomis. 18. Description of an Ar- 

 ticulate of doubtful relationship from the Tertiary beds of Floris- 

 sant, Colorado, S. H. Scudder. 19. Mythology of the Zum* In- 

 dians, F. H. Cushing. 20. On the polarization of the light of 

 the Moon, A. W. Wright. 21. On the results of the incandes- 

 cent lamp tests at the Paris Exhibition, G. F. Barker. 22. On 

 the infra-red portion of the solar spectrum as studied with the 

 bolometer, S. P. Langley. 



Friday, April 21, 1882. — 23. On the formation of metalliferous 

 vein formation at Sulphur Bank, California, Joseph Leconte. 24. 

 Un a form of standard Barometer, A. W. Wright. 25. On a mar- 

 tial genus from the Eocene, E. D. Cope. 26. On a fallacy in 

 indu< tjon, C. S. Peirce. The committee to examine into the in- 

 stigations into the value of sorghum as a source of sugar, 

 made an interesting report. Professor Ira Remsen, of Baltimore, 

 was elected a member. 



Philadelphia Academy Natural Sciences, Dec. 13.— Mr. 

 cycler described the development of fish eggs. He agreed with 



«s and Rauber in the opinion that the rim of the blastoderm 

 g°es to form a part of the muscular plates of the side of the body. 



