PROCEEDINGS. 
535 
Bureau, U. S. Department of Agriculture, entitled Barometers 
and the measurement of atmospheric pressure, 1894.] 
Remarks were made by Messrs. Harkness and Marvin. 
Mr. G. W. Littlehales made a communication on The effi¬ 
ciency of oil for lessening the violence of breaking waves. [Not 
published. The substance of the paper was printed on the re¬ 
verse side of the pilot chart of the North Atlantic ocean issued 
by the Navy Department for the month of February, 1894.] 
418th Meeting. March 17, 1894. 
President Fletcher in the chair. 
Thirty-one members and guests present. 
Mr. Alexander Macfarlane, of the University of Texas, by 
invitation, read a paper entitled The fundamental principles of 
exact analysis. [Not published.] 
This was discussed by Messrs. Harrington, Bigelow, and 
Macfarlane. 
Mr. F. L. 0. Wadsworth read a paper on A machine for me¬ 
chanically analyzing Fourier’s “ visibility ” curve and its appli¬ 
cation to the solution of least square problems. [Not published. 
Is expected to appear soon in the Philosophical Magazine.] 
419th Meeting. March 31, 1894. 
President Fletcher in the chair. 
Twenty-six members and guests present. 
Mr. C. H. Kummell read a paper on The direct synthetical 
method of adjusting a triangulation. [Published in U. S. Coast 
and Geodetic Survey Report for 1892. 8°, Washington, 1894, 
Appendix No. 12, pp. 535-552; also as a separate, with the 
date 1893.] 
Remarks were made by Messrs. Doolittle, Baker, and Kum¬ 
mell. 
