8. "On the Ghosts in Rutherford's 'Diffraction Spectra,'" American Journal of Mathematics, Vol. 2 (1879), pp. 330-347.
9. "Note on a Comparison of a Wave-Length with a Meter," American Journal of Science, Vol. 18 (1879), p. 51.
10. "A Quincuncial Projection of the Sphere," American Journal of Mathematics, Vol. 2 (1879), pp. 394, 396.
11. "Numerical Measure of Success of Predictions," Science, Vol. 4 (1884), p. 453.
12. "Proceedings Assay Commission" Washington, 1888. (Joint Reports on Weighing.)
B. Geodetic Researches. The Pendulum.
1. "Measurement of Gravity at Initial Stations in America and Europe," Report of the U. S. Coast Survey, 1876, pp. 202-237 and 410-416.
2. "De l'influence de la flexibilité du trépied sur l'oscillation du pendule a réversion," Conférence Geodesique Internationale (1877) Comptes Rendus, Berlin, 1878, pp. 171-187. (This paper was introduced by Plantamour and was followed by the notes of Appolzer.)
3. "On the Influence of Internal Friction upon the Correction of the Length of the Second's Pendulum," Proceedings of the American Academy, Vol. 13 (1878), pp. 396-401.
4. "On a Method of Swinging Pendulums for the Determination of Gravity proposed by M. Faye," American Journal of Science, Vol. 18 (1879), pp. 112-119.
5. "Results of Pendulum Experiments," American Journal of Science, Vol. 20 (1880).
6. "Flexure of Pendulum Supports," Report of the U. S. Coast Survey, 1881, pp. 359-441.
7. "On the Deduction of the Ellipticity of the Earth from the Pendulum Experiment," Report of the U. S. Coast Survey, 1881, pp. 442-456.
8. "Determinations of Gravity at Stations in Pennsylvania," Report of U. S. Coast Survey, 1883, Appendix 19 and pp. 473-486.
9. "On the Use of the Noddy," Report of the U. S. Coast Survey, 1884, pp. 475-482.
10. "Effect of the Flexure of a Pendulum upon the Period of Oscillation," Report of the U. S. Coast Survey, 1884, pp. 483-485.
11. "On the Influence of a Noddy, and of Unequal Temperature upon the Periods of a Pendulum," Report of the U. S. Coast and Geodetic Survey for 1885, pp. 509-512.
C. Psychologic. "On Small Differences in Sensation" (in co-
