Though clearly prepared for the press, this work was not published by Swedenborg. It was written in 1741-2. The work treats of the medullary fibre of the brain, the nerve fibres of the body, the arachnoid tunic, and diseases of the fibre. The latter part treats of both physical and psychological pathology. Particularly important, philosophically, is a 30-page section on Swedenborg’s doctrine of forms, a crucial doctrine in his causal theory. This edition also includes Author and Subject Indexes.
The Fibre is the third, posthumously published, transaction in Swedenborg’s The Economy of the Animal Kingdom (aka Dynamics of the Soul’s Domain) series. This translation was published by the Swedenborg Scientific Association in 1918 and reprinted in 1976.