ACADEMY OF SCIENCES.] ASTRONOMY. 43 



178. Observations of the solar eclipse of 1892, October 20, made at the Johns Hopkins Univer- 



sity, Baltimore. 

 Astr. JL, vol. 12 (Dec. 9, 1892): 141; vol. 13 (Mar. 9, 1S93): 24. 



179. "Algebra," "Algol," "Almanac," "Almucantar," "Altazimuth," "Analysis," "Angle," 



"Asteroids," "Astronomy," "Binary system," "Calculus," " Collimation," "Colli- 

 mator," "Comets," "Composition of forces," "Curves," "Eclipse," "Ecliptic, 

 "Energy," "Energy, conservation of," "Equation," "Falling bodies," "Fluxions, 

 "Functions," "Geodesy," "Geometry," "Horizon," "Imaginary quantities," "In 

 commensurables," " Infinities and infinitesimals," " Interpolation," "Jupiter," " Light, 

 "Limits," " Logarithms," "Magic squares," "Mars," "Mathematics," "Mercury, 

 "Moon," "Nebular hypothesis," "Observatory," " Occupations," "Orbit," "Paral 

 lax," " Perturbations," "Photometry," "Planet," "Precession of the equinoxes, 

 "Probability," "Progression," "Ptolemaic system," "Quadrature of the circle, 

 "Quaternions," "Saturn," "Series," "Solar parallax," "Solar system," "Stars, 

 "Sun," "Telescope," "Time," "Transit," "Transits of Venus and Mercury," "Trig- 

 onometry," "Trilinear coordinates," "Twilight," "Universe," "Venus," "Vulcan," 

 "Year," "Zodiacal light," in Johnson's Universal Cyclopedia [later Universal Cyclo- 

 pedia and Atlas], 8 volumes. 

 New York, A. A. Johnson Co., 1893-1S95. 



S. Newcomb was the "Associate editor" for "astronomy and mathematics'' in connection with this work. See also dos. 102 

 and 25S in this Section. 



180. On the lunar equation in the heliocentric motion of the earth. 



Astr. Nach., vol. 132 (Mar. 8, 1893): cols. 161-164. 

 Dated Washington, Jan. 1, 1893. 



1S0X 1 . [Letter dated June 21, 1893, to the Secretary of the Navy, and a testimonial to Dr. 

 J. Morrison dated May 1, 1886]. 

 Astronomy and Astrophysics, Northfield, Minn., vol. 12 (Aug. and Oct., 1893): 665, 760. 

 Compare no 61 of Section I. 



181. A development of the perturbative function in cosines and multiples of the mean anomalies 



and of angles between the perihelia and common node and in powers of the eccentric- 

 ities and mutual inclinations. 



Astr. Papers, vol. 5, 1895, pt. 1 (1894): 1-48. 



182. Inequalities of long period stars and of the second order as to the masses in the mean 



longitudes of the four inner planets. 

 Astr. Papers, vol. 5, 1895, pt. 2 (1894): 49-96. 



183. Theoiy of the inequalities in the motion of the moon produced by the action of the planets. 



Astr. Papers, vol. 5, 1895, pt. 3 (1894): 97-295. 



184. Secular variations of the orbits of the four inner planets. 



Astr. Papers, 1895, vol. 5, pt. 4 (1894): 297-378. 



185. Considerations on the best methods of determining the positions of the planets by obser- 



vation. 

 Astr. Jl., vol. 13 (Feb. 10, 1894): 191-192. 



186. Remarks on Mr. Stone's proposed corrections to the measure of time since 1864. 



Mo. Notices R. Astr. Soc, vol. 54 (Mar. 9, 1894): 286-288. 



187. Two questions on Mr. Stone's proposed correction in the measure of time. 



Mo. Notices R. Astr. Soc, vol. 54 (May 11, 1894): 408. 



"Reply to Professor Newcomb's two questions" by Mr. Stone, pp. 409-112. 



188. On the elements of (33) Polyhymnia and the mass of Jupiter. 



Astr. Nach., vol. 136 (Aug. 29, 1894): cols. 129-134. 

 Dated Washington, June 1, 1894. Compare no. 205, below. 



189. Reorganization of the Naval Observatory. 



The Evening Post, New York, vol. 93. (Sept. 26, 1894): 6, cols. 4-5. 

 Also in Nation, New York, vol. 29 (Sept. 27, 1894): 228. 

 Anonymous editorial. 



1 This number is used because the title was inserted in galley proof. 

 59490°— 24 4 



