This booklet tells us about the possibility of using solar fire, that is, our King star, to achieve the Great Work quickly and wonderfully. He reveals the device, teaches how to develop the Stone and at the same time drinkable gold, simply by calcining common gold with the solar apparatus that he describes in his pages and that ancient chemists verified its effectiveness. Illustrated in full color and in hardcover for the collection. Includes a prologue with photos and analysis of the uptake of the pulvis solaris. In fact, this book is entirely dedicated to the deciphering of the pulvis solaris.