Unpublished paper, 'An experimental inquiry into the nature of the metamorphosis of saccharine matter, as a normal process of the animal economy' by Frederick William Pavy Pavy begins by observing that the 'saccharine matter' met with in the animal economy is derived from two sources: from the vegetable kingdom, and from the liver of the animal itself, in each case being poured into the general circulation through the hepatic veins. He describes a series of experiments into the metamorphosis of sugar in the body. Annotations in ink throughout. Subject: Chemistry / Physiology Received 12 April 1855. Read 26 April 1855 / 3 May 1855. Communicated by George Owen Rees. Whilst the Royal Society declined to publish this paper in full, an abstract of the paper was published in volume 7 of the Proceedings of the Royal Society as 'An experimental inquiry into the nature of the metamorphosis of saccharine matter, as a normal process of the animal economy'. 1855