DANIELL, JOHN FREDERICK, a distinguished chemist, born in London; professor of Chemistry in King's College, London; wrote "Meteorological Essays," and "Introduction to Chemical Philosophy"; invented a hygrometer and an electric battery (1790-1845).

He came to England, was appointed reader to Queen Charlotte, and lived in the enjoyment of that office, and in the gratifying knowledge that Her Majesty kept his presentation hygrometer in her private apartments, to the venerable age of ninety.

On Aug. 11th I went with Whewell to the clouds on Skiddaw, to try hygrometers.