Paper, 'Supplement to Ld Brgham's [Lord Brougham's] paper' by Henry Peter Brougham This is a later addition to Brougham's paper found at PT/37/11. Only small portions of this supplement were printed as part of the paper. 11 manuscript pages and five plates showing various apparatuses used in Brougham's experiments on light. Subject: Physics Portions published as part of paper in Philosophical Transactions titled 'Experiments and observations upon the properties of light'. / Received by the Royal Society on 9 February 1850. Abstract of paper 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 5, 1851. [1850]