 There was an established method for doing this which involved lengthy calculations but Monge devised a way of solving the problems by using drawings.At first his solution was not accepted, since it had not taken the time judged to be necessary, but upon examination the value of the work was recognized, and Monge's exceptional abilities were recognized.After Bossut left the École Royale du Génie, Monge took his place in January 1769, and in 1770 he was also appointed instructor in experimental physics.