Deruyts, Frangois Henri Gustave, 1864-1902 .**E.5124.68 Mémoire sur la théorie de Pinvolution et de Vhomographie uni-
cursale. — [Liége, 1890.] 208 pp. 8°.
[This work is kept on the Special Libraries Floor.)
rar | aK Oct. 3, Se 1901 : )
E1649 — Modern higher geometry.