📓 Excerpt from Journal für die Reine und Angewandte Mathematik, 1839, Vol. 19: In Vier HeftenPour y parvenir. Faisons d'ebord tourner. Dans leur plan, les axes des 3; et des a: jusqu'e ce que l'un deux se confonde avec l'axe des 0, l'autre lui étant perpendiculaire. Nous aurons alors, en distinguant les coordonnées nouvelles par des accents.About the PublisherForgotten Books publishes hundreds of thousands of rare and classic books. This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.