Santiago Ramon y Cajal and Three-Dimensional Cinema

摘要

In this article, I present and comment on two unpublished letters written by the Spanish engineer Carlos Mendizabal Brunet to Santiago Ramon y Cajal informing him of the development of a new device for three-dimensional cinema and asking for his approval. Fortunately, the answers given by Cajal to these two letters have also been preserved, and they reveal his interest in three-dimensional cinema; in the letters, he reported that he himself had designed a prototype capable of creating on a screen a feeling of 3-D relief, a subject about which he was always passionate.