AVISON, CHARLES, organist of Newcastle, and a disciple of Geminiani, was the author of an essay on musical expression, published in the year 1752, in which are some judicious reflections on music in general, but his division of the modern authors into classes is rather fanciful than just. Throughout his book he celebrates Marcello and Geminiani; the latter frequently in prejudice to Mr Handel. In the year 1753 came out remarks on Mr Aison's essay on musical expression, the author whereof first points out sundry errors against the rules of composition in the works of Aison. In the same year Aison republished his essay, with a reply to the author of the remarks; and a letter, containing a number of loose particulars relating to music, collected in a course of various reading, unquestionably written by Dr Jortin. Aison promoted and assisted in the publication of Marcello's music to the psalms adapted to English words. Of his own composition there are extant five collections of concertos for violins, 44 in number; and two sets of sonatas for the harpsichord and two violins, a species of composition little known in England till his time. The music of Aison is light and elegant, but it wants originality; a necessary consequence of his too close attachment to the style of Geminiani, which in a few particulars only he was able to imitate.