 The Symphony No. 1 in C minor for full @-@ scale orchestra was written in 1824 , when Mendelssohn was aged 15 . This work is experimental , showing the influences of Beethoven and Carl Maria von Weber . Mendelssohn conducted this symphony on his first visit to London in 1829 , with the orchestra of the Royal Philharmonic Society . For the third movement he substituted an orchestration of the Scherzo from his Octet . In this form the piece was a success , and laid the foundations of his British reputation . 
