Dr. Young's theory of light was treated with the most sovereign contempt by Lord Brougham, in the earlier numbers of the Edinburgh Review; and Dr. Young died without reaping the honour of his discovery. The theory is now recognised as true; and M. Arago has formally vindicated Dr. Young from the noble critic's animadversions, in a discourse delivered at the French Institute.

In 1809, when the first application was made to Parliament on gas-lighting, the movers in the project were much opposed; a committee of the House of Commons was granted, but the application terminated unsuccessfully; and the testimony of Mr. Accum to the practicability of gas-lighting exposed him to the severe animadversions and ridicule of Mr. Brougham.