Excerpt from Projections Molteni, Éditions des Diapositives pour Conférences Scientifiques Et Mondaines: Catalogue Général des Vues Scientifiques Et Littéraires Classées Suivant un Ordre Méthodique Et Rationnel (Tous Droits de Reproductions Réservés)Images produites par deux miroirs parallèles. Images produites par deux miroirs faisant entre eux un angle droit. Foyer principal d'un miroir sphérique concave.About the PublisherForgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.comThis 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.