(London, W. Bulmer and Co., 1813). 4to. No wrappers as extracted from ""Philosophical Transactions"" 1813 - Part I. Pp. 101-109
First printing of Brewsters first paper in the Transactions in which he gives a preliminary result of his testing of the transmission of light through around 200 transparent substances. In a paper issued the next year (1814) he called the different phenomena that he observed here, Biaxal and Uniaxal.