But steam-power had by 1830 grown large enough to strike out more boldly. The Savannah’s effort was an attempt in which steam was only an auxiliary, and one, too, of a not very powerful kind. Our coastwise steamers, as well as those employed in Great Britain, as also the voyage of the Enterprise to Calcutta in 1825 (though she took 113 days in doing it), had settled the possibility of the use of steam at sea, and the question had now become whether a ship could be built to cross the Atlantic depending entirely on her steam power. It had become wholly a question of fuel consumption. The Savannah, it may be said, used pitch-pine on her outward voyage, and wood was for a very long time the chief fuel for steaming purposes in America. How very important this question was will be understood when it is known that Mr. McGregor Laird, the founder of the Birkenhead firm, in 1834, laid before the Committee of the House of Commons on Steam Navigation to India the following estimate of coal consumption: Under 120 horse-power, 10-1/2 lbs. per horse-power. 160 „ 9-1/2 „ „ 200 „ 8-1/2 „ „ 240 „ 8 „ „ Or more than four times what is consumed to-day in moderately economical ships. In other words, to steam at her present rate across the Atlantic the City of New York, of 18,000 horse-power, would need to start with something like 7,500 tons of coal on board were her consumption per indicated horse-power equal to that of the best sea practice of that date, which could hardly have been under 6 pounds per indicated horse-power per hour. This may be said to have been the status of affairs when, in 1836, under the influence of Brunei’s bold genius, the Great Western Steamship Company was founded as an off-shoot of the Great Western Railway, whose terminus was then Bristol. Brunel wished to know why the line should not extend itself to New York, and the result of his suggestion was the formation of the steamship company and the laying down at Bristol of their first ship, the Great Western. Brunel’s large ideas were shown in this ship, though in comparatively a less degree, as well as in his later ones. She was of unprecedented size, determined on by Brunel as being necessary for the requisite power and coal-carrying capacity. The following were her principal dimensions: Length over all, 236 ft.; length between perpendiculars, 212 ft.; length of keel, 205 ft.; breadth, 35 ft. 4 in.; depth of hold, 23 ft. 2 in.; draught of water, 16 ft. 8 in.; length of engine-room, 72 ft.; tonnage by measurement, 1,340 tons; displacement at load-draught, 2,300 tons. [Illustration: The Great Western, from an old painting.]