Dans cet ouvrage, Louis Bourguet présente une série de lettres dans lesquelles il expose sa théorie de la formation des sels et des cristaux, ainsi que sa vision du mécanisme organique des plantes et des animaux. Il s'appuie sur des observations précises et des expériences rigoureuses pour démontrer la validité de ses idées. Cet ouvrage est un témoignage passionnant de la méthode scientifique au XVIIIe siècle. This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work is in the "public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.