Unpublished paper, 'Researches into the effects of certain physical and chemical agents on the nervous systems, section II' by Marshall Hall Hall continues with his earlier research (see AP/29/5), this time writing on the electrogenic condition of the spinal marrow and of the incident spinal nerves. He shares details of experiments on a frog. Followed by three pages of figures showing experiments on frogs' legs. Annotations in pencil throughout. Subject: Neuroscience / Electricity Received 14 April 1847. Whilst the Royal Society declined to publish this paper in full, an abstract of the paper was published in volume 5 of Abstracts of the Papers Printed in the Philosophical Transactions of the Royal Society of London [later Proceedings of the Royal Society] as 'Researches into the effects of certain physical and chemical agents on the nervous system'. April 1847