(Berlin, Uppsala & Stockholm, Paris, 1892 a. 1897. 4to. Without wrappers as extracted from "Acta Mathematica Hrsg. von G. Mittag-Leffler.", Bd. 16 and 20. Fine and clean. Pp. 297-339 (+) pp. 313-355.
First edition of these important papers on the polarization of light. The geometrical representation of different states of polarization by points on a sphere is due to Poincare. The method shown to visualize the different states of polarization is given in these two papers and the method is called Poincare's Sphere.
Order-nr.: 45849