128 PHILOSOPHICAL SOCIETY OF WASHINGTON. 
LIST OF MATHEMATICAL PUBLICATIONS BY GENERAL BENJAMIN 
ALVORD. a 
1. The tangencies of circles and of spheres. 
[Jn Smithsonian Contributions to Knowledge. 4°. Wash- 
ington, 1856, Vol. 8, Article 4, 16 pp., 9 plates. ] 
Also issued separately. 
2. On the interpretation of imaginary roots in questions of maxima 
and minima. 
[In The Mathematical Monthly. 4°. New York, 1860, . 
April, Vol. 2, No. 7, pp. 237-240.] 
3. Tangencies. 
[Jn Johnson’s New Universal Cyclopedia. 8°. New York, 
1878, Vol. 4, pp. 723-4. ] 
4. Mortality in each year among the officers of the army for fifty 
years, from 1824 to 1873, as derived from the army 
registers. 
[In Proceedings of the American Association for the Ad- 
vancement of Science, 23d Meeting, Hartford, August, 
1874. 8°. Salem, 1875, pp. 57-59.] 
5. The intersection of circles and the intersection of spheres. 
[Jn American Journal of Mathematics. 4°. Baltimore, 
1882, March, Vol. 5, No. 1, pp. 25-44; 4 plates. ] 
6. Curious fallacy as to the theory of gravitation. 
[Jn Bulletin of the Philosophical Society of Washington. 
8°. Washington, 1883, Vol. 5, pp. 85-88.] 
tok special case in maxima and minima. 
[Jn Bulletin of the Philosophical Society of Washington. 
8°. Washington, 1884, Vol. 6, p. 149.] 
Mr. M. Baker, in moying the adoption of this memorial by the 
Section, said: 
General Alvord’s entire life was that of the soldier, and his 
routine of life work did not call him in the direction of mathemati- 
cal study. Hence whatever he accomplished in mathematics or 
literature was accomplished in military surroundings and with only 
such facilities as barrack and camp life afford. If under these 
