

• 



American Association for the Advancement of Science. 313 



4. On Tndianite of Bournon and an American Mineral which has 

 been distributed under the same name, by Prof. B. Silliman, Jr. 



5. On the so-called Picrolite and Slaty Serpentine of Texas, Lancas- 

 ter Co., Pa., by Prof. B. Silliman, Jr. 



6. On the Chemical Constitution of the Gorgonia antipathes of Ber- 

 muda and the \%st Indies, by Prof. B. Silliman, Jr. 



7. On the Explorations of the Gulf Siream in connection with the 

 U. S. Coast Survey, by Prof. A. D. Bache. 



8. On the Ribbon Structure of Glaciers, and its analogy to Slaty 

 Cleavage, by H. D. Rogers. 



SECTION OF NATURAL HISTORY, GEOGRAPHY, &c. 



1- On the Erratic Phenomena of the Central Alps, by Prof. Arnold 



GuYOT. 



2. On the Circulation of Fluids in Insects, by Prof. Louis Agassiz. 



3. On the Embryology of Ascidia and the Characteristics of New 

 Species from the shores of Massachusetts, by Prof. Louis Agassiz. 



4. Note on the Mirage on Lake Superior, by Dr. C. T. Jackson. 



5. Remarks on the distribution of Testacean Mollusca in Jamaica and 

 the other West India Inlands, by Prof. C. B. Adams. 



6. On the Erosions of the Earth's Surface, by President Edward 

 Hitchcock. 



7. On the River Terraces of the Connecticut Valley, by President 

 Edward Hitchcock. 



8. Description of Certain Mineral Localities, chiefly in the Northern 

 part of Worcester and Franklin Counties in Massachusetts, by Charles 

 Hartwell and Edward Hitchcock, Jr. 



9. On the Structural Features of the Appalachians compared with 

 those of the Alps and other disturbed districts of Europe, by Prof. 

 Henry D. Rogers. 



There was a general meeting at Lyceum Hall in the evening, when 

 an address was presented : 



On the progress of the Survey of the Coast of the United States, by 

 p rof. A. D. Bache. 



Friday , Aug. 17. 



SECTION OF PHYSICS, CHEMISTRY, &c. 



L Report on the Progress of the Telegraphic Determinations of Dif- 

 ference of Longitude in the U. S. Coast Survey, by Sears C. Walker. 



2. Experimental Determinations of the Economical Value of British 

 and American Fossil Fuel, by Prof. W. R. Johnson. 



3. On Leucine, by T. S. Hunt. 



4. On tho Mm m i Wate~~ ~ p ^"»^ Hv T\ S. Hunt. 



5. On the Occurrence of Soda in Anthracite, by Prof. Horsford. 



6 - On the color of fused Sulphur, by Prof. Horsford. 



" A new form of Demonstration of the Parellogram of Forces, by 



pf of. Pkirce. 



SECTION OF NATURAL HISTORY, GEOLOGY, kc. 



1- On the Trend of Islands and Axis of Subsidence in the Pacific, 



b y J- D. Dana. 



.—Sept., 1 S49. 40 



