Paper, 'On the effects of simple pressure in producing that species of crystallisation which forms two oppositely polarised images, and exhibits the complementary colours by polarised light' by David Brewster in a letter to the Right Hon Sir Joseph Banks Subject: Optics / Physics Published in Philosophical Transactions as 'On the effects of simple pressure in producing that species of crystallization which forms two oppositely polarised images, and exhibits the complementary colours by polarised light. By David Brewster, LL. D. F. R. S. Edin. and F. S. A. Edin. In a letter addressed to the Right Hon. Sir Joseph Banks, Bart. K. B. P. R. S'. Written by Brewster in Edinburgh. Read 19 January 1815. 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. 3 January 1815