Plate, lines of solar spectrum by unknown artist Plate containing figures 1-11 showing diagrams of the lines of the solar spectrum at various altitudes. Subject: Physics Published in Philosophical Transactions as 'On the lines of the solar spectrum'. Received by the Royal Society on 26 January 1860. Read 23 February 1860. 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 10, 1860. [1860]