JSTOR Daily

Color Mixture and Fundamental Metamers: Theory, Algebra, Geometry, Application

This paper explores the consequences of Wyszecki's hypothesis concerning metameric stimuli, that any radiometric function (column matrix N) comprises two components -- a fundamental metamer (column ...
JSTOR Daily

Submanifolds of Euclidean Space with Parallel Second Fundamental Form

In this paper necessary conditions are given for a complete Riemannian manifold $M^n$ to admit an isometric immersion into $R^{n + p}$ with parallel second ...
Nature

The Fundamental Definitions and Propositions of Geometry, With Especial Reference to the Syllabus of the Association for the Improvement of Geometrical Teaching

I DESIRE to offer some suggestions respecting the form and arrangement of the elementary definitions and propositions of the Euclidian geometry. It has appeared to me that the recent German textbooks ...