The Period from 1851 to i860 11 



president ; the Association suspended activities during the period of the 

 Civil War, 1861 to 1865. 



Papers of Especial Interest Presented at the Meetings 1 



The Cincinnati Meeting, May, 18 51. ( Vol. 5) 



1. On the Azoic System, as Developed in the Lake Superior Land Dis- 

 trict. J. W. Foster and J. D. Whitney. 



2. On the Constitution of Saturn's Ring. Benjamin Peirce. 



3. Notice of the Ancient Human Skulls, and other Bones, found in a 

 Cave near Elyria, Ohio. Chas. Whittlesey, Sr. 



The Albany Meeting, August, 18 51. ( Vol. 6) 



1. On a New Form of Microscope, with a New Mode of Measurement 

 of Dimensions and Angles. J. Lawrence Smith. 



2. Remarks upon the Unconformahility of the Palaeozoic Formations of 

 the United States. Louis Agassiz. 



3. Description of Samples of Ancient Cloth from the Mounds of Ohio. 

 J. W. Foster. 



The Cleveland Meeting, July, 1853. ( Vol. 7) 



1. On the Binocular Microscope. J. L. Riddell. 



2. On the Geology of the Choctaw Bluff. A. Winchell. 



3. On the Wheat-Fly and its Ravages. R. Howell. 



The Washington Meeting, May, 1854. {Vol. 8) 



1. Results of Some Investigations Respecting Biela's Double Comet. J. S. 

 Hubbard. 



2. On the Distribution of Temperature in and near the Gulf Stream, off 

 the Coast of the United States, from Observations made in the Coast Sur- 

 vey. A. D. Bache. 



3. An Account of a Tornado which passed over the State of Connecticut 

 on the 9th of August, 185 1. John Brocklesby. 



4. Experimental Observations on Taste and Smell. Theodore C. Hilgard. 



The Providence Meeting, August, 1855. (Vol. 9) 



1. Improvements in the Electric Telegraph, whereby two or more Ter- 

 minal Stations can make Simultaneous Use of the Same Wire. Moses G. 

 Farmer. 



2. On the Occurrence of the Ores of Iron in the Azoic System. J. D. 

 Whitney. 



1 All references are to the Proceedings. 



