42 
26. On the Structure of the Moon, by S. Alexander. 
27. On the Systems of Mountain Upheaval to which the | 
Continent of North America owes its Present Configuration, 
by J. D. Whitney. 
28. Abstract of Geological Investigations made in China 
and Mongolia, by Raphael Pumpelly. (Communicated by 
J. D. Whitney.) 
29. Examination of Shells obtained by the Sounding-Lead 
in the Coast Survey of New York and New Jersey, with 
some Nautical Hints, by Augustus A. Gould. 
30. On the probable immediate Cause of the Glacial 
Epoch of the Post-Tertiary, by A. Guyot. 
31. On the Lower Silurian Oils of Kentucky and Ten- 
nessee, by J. S. Newberry. 
32. Suggestions relative to the Annular Eclipse of the Sun, 
of October next, by S. Alexander. 
33. On Certain Converging Series expressing the Ratio of 
the Diameter to the Circumference of the Circle, by William 
Ferrel. (Communicated by Benjamin Peirce.) 
34. On a Tide Meter, by J. M. Batchelder. (Communi 
eated by Benjamin Peirce.) 
Of the communications heretofore presented, five are 1 
cluded in the first volume of the Memoirs of the National 
Academy of Sciences, now being printed by order of the 
Senate of the United States. ‘The minor papers will be col- 
lected and published in a smaller volume, under the title of 
Proceedings. 
The current expenses of the Academy, and the cost of 
publishing the Annual, have been, as before, defrayed — 
the contributions of members. 
‘The vacancies in the Academy have been filled by the 
_ election of William D. Whitney and S. Weir Mitchell. 
The Council for the year 1866 consists of M. C. Meigs 
