In 1747 he applied his new calculus to the problem of vibrating chords, the solution of which, as well as the theory of the oscillation of the air and the propagation of sound, had been given but incompletely by the geometricians who preceded him.
Propagation facilities are being greatly improved, and there are stringent laws for the protection of immature fish.
His only published works are two sermons, one preached before the Lords (London, 1794), the other before the Society for the Propagation of the Gospel (London, 1797).
Deep. Propagation is effected by seed or increase of corms; the seed should be sown as soon as it is ripe in June or July.
John was sent out by the Society for the Propagation of the Gospel, and hoped to labour as a missionary among the Indians, but though he had many interesting conversations with them the mission was found to be impracticable.