176 Scientific Intelligence. 



Dr. George W. Sloan is chairman of the Local Committee. 

 Members of the Association arriving in Indianapolis before the 

 meeting should call for information at the temporary office of the 

 local secretary, Alfred F. Potts, No. 19| N. Pennsylvania street. 



The American Geological Society will hold its semi-annual 

 meeting at the State House, on August 19. 



2. Hailstones of peculiar form ; by O. W. Huntington. (Com- 

 municated). — During a severe thunder storm at Asquam Lake, 

 Holderness, N. H., on July 14th, there was a fall of large hail- 

 stones continuing for some 10 minutes. On examination, many of 

 the stones proved to be sharply defined crystals having the form 

 of a double hexagonal pyramid, resembling dodecahedral quartz; 

 others were rounded and flattened and some had a spherical 

 nucleus with small partially formed crystals projecting from it. 



3. Oswald's Klassiker der exacten Wissenschaften. Leipzig, 

 1890. (Wm. Engelmann.) — Recent issues in this valuable series 

 (this Journal, vol. xxxviii, 256) are the following : 



No. 4. Untersucbungen ueber das Jod, von Gay Lussac (1814). 



No. 5. Allgemeine Flachentheorie (Disquisitiones generates circa superficies 

 curvas), von Carl Friedrich Gauss (1827). 



No. 6. Ueber die Anwendung der Wellenlehre auf die Lehre vom Kreislaufe 

 des Blutes und insbesondere auf die Pulslehre, von E. H. "Weber (1850). 



No. 7. Untersuchungen ueber die Lange des einfachen Secundenpendels, von 

 F. W. Bessel (1826). 



No. 8. Die Grundlagen der Holekulartkeorie. Abhandlungen, von A. Avogadro 

 und Ampere (1811-1814). 



No. 9. Theimochemische Untersuchungen, von G. H. Hess (1839-1842). 



No. 10. Die mathematischen Gesetze der inducirten elektrischen Strome, von 

 Franz Neumann (1845). 



No. 11. Unterredungen und mathematische Demonstrationen iiber zwei neue 

 "Wissenszweige die Mechanik und die Fallgesetze betreflend, von Galileo Galilei. 

 Erster und zweiter Tag (1638). 



No. 12. Allgemeine Naturgeschichte und Theorie des Himmels oder Versuch 

 von der Verfassung und dem mechanischen Ursprunge des ganzen Weltgebaudes 

 nach Newtonischen Grundsatzen abgehandelt. von Immanuel Kant (1755). 



Obituary. 

 Christian Henry Frederick Peters, the ever active and 

 accomplished astronomer, at the head of the Observatory of 

 Hamilton College, Clinton, N. Y., died on the 19th of July, in 

 his 77th year. In 1838, having two years before taken the 

 degree of Doctor of Philosophy at Berlin, he was with von Wal- 

 tershausen in his study of Mt. Etna, and afterward on the Geodetic 

 Survey of Naples. After the revolution of 1848 he left Italy, and 

 in 1853 came to the United States. He received an appointment 

 from the U. S. Coast Survey, and was for a while at the Cam- 

 bridge and then the Albany observatory, before his call in 1858 

 to Hamilton College. His laborious work of mapping the stars 

 was rewarded by the discovery of forty-seven asteroids. In 

 1882 a first series of his "Celestial Charts," twenty in number, 

 was published. His results also include observations on comets, 

 on solar spots, on the Transit of Venus on the New Zealand Expe- 

 dition in 1874, when he took 237 photographs, and observations 

 at the Solar Eclipse of 1869, at Des Moines, Iowa. 



