THOMSON, THOMAS.

On some of the compounds of chromium. Read March 29, 1827.

(London, W. Nicol, 1827). 4to. No wrappers as extracted from "Philosophical Transactions" 1827 - Part II. Pp. 159-230. Clean and fine.

First printing of the paper in which Thomson describes his discovery of chromyl chloride, which he thought was a compound of '1 atom chromic acid' and '1 atom of chlorine', of chromium chromate and some new chromates.

"The principal object of this Paper is to give an account of a singular combination of chromic acid, and chlorine, which I discovered about a year and a half ago. But as the investigation of this compound led me to a more careful examination of the oxides of chromium, and a more accurate knowledge of their composition than had hitherti attained, I shal also state the facts which I have ascertained with respect to these bodies."(Thomson).

Order-nr.: 43371