Note 2 — Chapter II · SPEED AND POWER OF MODERN STEAMSHIPS.
Reading edition
While these sheets were passing through the press, the America was tried unofficially on the Clyde, and attained a speed of 17 knots, with about 6,500 indicated horse-power. On her passage from the Clyde to the Mersey she maintained, it is stated, 18¼ knots over the whole distance.