8080 



211 



8100 



cations to the theory of ruled surfaces. 

 New York, X.Y., Trans. Amer. Math. 

 Soc, 3, 1902, (423-150). 



8090 SYSTEMS (LINEAR, AND 

 NOT LINEAR) OF CURVES 

 AND SURFACES. 



Eisenhart, L. P. Isothermal-conjugate 

 systems of lines on surfaces. Amer. J. 

 Math., Baltimore, .Aid., 25, 1903, (213- 



248). 



Uven, M[arie] J[ohan] van. La surface 

 cubique de revolution . . . [Fais- 

 ceaux et systemes lineaires du troisieme 

 ordre de ces surfaces]. Haarlem, Arch. 

 Mus. Teyler, (Ser. 2), 8, [19031, (407- 

 488, av. 2 pi.). 



Wilczynski, E. J. On a certain con- 

 gruence associated Avith a given ruled 

 surface. New York, N. Y., Trans. Amer. 

 Math. Soc, 4, 1903, (185-200). 



Covariants of systems of 



linear differential equations and applica- 

 tions to the theory of ruled surfaces. 

 New York, N.Y., Trans. Amer. Math. 

 Soc, 3, 1902, (423-450). 



8100 ALGEBRAIC CONFIGURA- 

 TIONS IN HYPERSPACE. 



Blichfeldt, H. F. On the determina- 

 tion of the distance betAveen the points 

 in space of n dimensions. New York, 

 N.Y., Trans. Amer. Math. Soc, 3, 1902, 

 (467-481). 



Hardy, James G. Curves of triple 

 curvature. Amer. J. Math., Baltimore, 

 Md., 24, 1902, (13-38). 



Haskell, M[ellen] W[oodraan]. Gene- 

 ralization of a fundamental theorem in 

 the geometry of the triangle. Arch. 

 Math., Leipzig, (3. Reihe), 5, 1903, (278- 



281). 



Kantor, S. Die linearen Systeme 

 linearer Strahlenkoraplexe im Rr. 

 Wien, SitzBer. Ak. Wiss., 112, 1903, 

 Abth. Ila, (815-877). 



Kowalewski, Gerhard. Ueber die 

 projektive Gruppe der Normkurve und 

 eine charakteristische Eigenschaft des 

 sechsdimensionalen Raumes. Leipzig, 

 Ber. Ges. Wiss. math.-phys. KL, 54, 

 1902,(371-392). 

 (A 9833) 



Liebmann, Heinrich. Die Kegel - 

 schnitte und die Planetenbewegung iin 

 uichteuklidischen Raum. Leipzig, Ber. 

 Ges. Wiss., math.-iihys. KL, 54, 1902, 

 (393-423). 



Meyer, W. Fr[anz]. Zu der vor- 

 stehenden Mitteilung des Herrn M. W, 

 Haskell iiber die Verallgemeiuerung 

 eines Steiner'schen Satzes. Arch. Math., 

 Leipzig, (3. Reihe), 5, 1903, (282-287). 



Moreno, Halcott C. On ruled loci in 

 ji-fold space. Boston, Mass., Proc. 

 Amer. Acad. Arts ScL, 37, 1901, (121- 

 157). Separate. 24.5 cm. 



Piccioli, E. Criterio per riconoscere 

 se siano o no congruenti due figure sim- 

 metriche rispetto a un S^ di S;,. Period, 

 mat., Livorno, 17, 1901-02, (313-315). 



Rosati, C. Sulle cui-ve ellittiche del 

 sest'ordine. Milano, Rend. 1st. lomb., 

 (Ser. 2), 35, 1902, (407-411). 



S[cliout]e, P[ieter] H[endrik]. [Be- 

 sprechung von] L. Schlafli's Theorie der 

 vielfachen Kontinuitat. (Hollandisch). 

 Amsterdam, Nieuw Arch. Wisk., (Ser. 

 2), 6, [1904], (199-206). 



How, and in how many 



ways, regular poly topes can be decom- 

 posed according to their vertices or to 

 their limiting spaces of the greatest 

 number of dimensions into systems of 

 congruent regular polytopes Avith a 

 common centre. Amsterdam, Proc Sci. 

 K. Akad. Wet., 6, [1903], (366-368) 

 (English) ; Amsterdam, Versl. Wis. Nat. 

 Afd. K. Akad. Wet., 12, [1903], (603- 

 605) (Dutch). 



[On a new notation of the 



3n] Pliicker's numbers of a curve in S„ 

 [allowing to write down the 3(n-l) rela- 

 tions between these numbers in three 

 formulae with an index taking succes- 

 sively the values 1 to ?i-l]. Amsterdam, 

 Proc. Sci. K. Akad. Wet., 6, 1904, (501- 

 505) (English) ; Amsterdam, Versl. Wis. 

 Nat. Afd. K. Akad. Wet., 12, 1904, 

 (705-709) (Dutch). 



Regular jarojections of 



[the] regular polytopes (of space Sn, 

 corresponding to the tetrahedron and 

 octahedron of our space]. Amsterdam, 

 Proc. Sci. K. Akad. Wet., 6, 1904, (783- 

 785) (English) ; Amsterdam, Yersl. AVis. 

 Nat. Afd. K. Akad. Wet., 12, 1904, (908- 

 910) (Dutch). 



