All text is in the original Latin.
About the author (from wikipedia):
Emanuel Swedenborg (1688 – 1772) was a Swedish scientist, philosopher, theologian, revelator, and mystic.
Swedenborg had a prolific career as an inventor and scientist. In 1741, at age 53, he entered into a spiritual phase in which he began to experience dreams and visions, beginning on Easter weekend of 6 April 1744.
These writings in this 3-volume set are all of his pre-spiritual writings, of tremendous interest to naturalists as well as spiritualists.
In 1715 Swedenborg devoted himself to natural science and engineering projects for the next two decades. A first step was his meeting with King Charles XII of Sweden in the city of Lund, in 1716. The Swedish inventor Christopher Polhem, who became a close friend of Swedenborg, was also present. Swedenborg’s purpose was to persuade the king to fund an observatory in northern Sweden. However, the warlike king did not consider this project important enough, but did appoint Swedenborg assessor-extraordinary on the Swedish Board of Mines (Bergskollegium) in Stockholm.
From 1716 to 1718, Swedenborg published a scientific periodical entitled Daedalus Hyperboreus (“The Northern Daedalus”), a record of mechanical and mathematical inventions and discoveries. One notable description was that of a flying machine, the same he had been sketching a few years earlier (see Flying Machine (Swedenborg)).
In 1718 Swedenborg published an article that attempted to explain spiritual and mental events in terms of minute vibrations or “tremulations”.
Upon the death of Charles XII, Queen Ulrika Eleonora ennobled Swedenborg and his siblings. It was common in Sweden during the 17th and 18th centuries for the children of bishops to receive this honour as a recognition of the services of their father. The family name was changed from Swedberg to Swedenborg.
In 1724, he was offered the chair of mathematics at Uppsala University, but he declined and said that he had mainly dealt with geometry, chemistry and metallurgy during his career. He also said that he did not have the gift of eloquent speech because of a stutter, as recognized by many acquaintances of his; it forced him to speak slowly and carefully, and there are no known occurrences of his speaking in public. The Swedish critic Olof Lagerkrantz proposed that Swedenborg compensated for his impediment by extensive argumentation in writing.