In this first-ever English translation of "Coelum Philosophorum seu de Secretis Naturae Liber," Christopher Templesage unveils the arcane world of alchemy as articulated by Philippo Ulstadio Patricio. This seminal work, a meticulous treatise on alchemical distillation, now accessible to the English-speaking world, guides readers through the construction and usage of sophisticated alchemical apparatus. It delves into the pursuit of the quinta essentia, prima materia, and universal salt, illuminating the path to the philosopher's stone. This translation is a must-have for contemporary practitioners and scholars, bridging ancient alchemical wisdom and modern scientific inquiry.