Paper, 'Astronomical observations and experiments tending to investigate the local arrangement of the celestial bodies in space, and to determine the extent and condition of the Milky Way' by Sir William Herschel Illustrations for this paper have been separated from the manuscript and are found at PT/73/6/17-18. Subject: Astronomy Published in Philosophical Transactions as 'Astronomical observations and experiments tending to investigate the local arrangement of the celestial bodies in space, and to determine the extent and condition of the Milky Way'. Written by Herschel at Slough near Windsor. Read 19 June 1817. Abstract published in Abstracts of the Papers Printed in the Philosophical Transactions of the Royal Society of London [later Proceedings of the Royal Society of London], Volume 2, 1833. 10 May 1817