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Early booms were made of wood, originally 10 inches (250 mm) in diameter but increased in the 1880s to 12 inches (300 mm). Each boom weighed 20 to 24 long cwt (1,000 to 1,200 kg) and cost £28 to £30. In the House of Commons on 9 April 1888 Admiral Field, who was MP for Eastbourne, asserted that steel booms designed by William Bullivant were at least 5 long cwt (250 kg) lighter, one-third less expensive and "superior in many other respects", and asked Lord George Hamilton, First Lord of the Admiralty whether the Committee on Torpedo Net Defence had recommended steel booms and whether the Admiralty would further test them. In reply the First Lord claimed that steel booms doubled up on impact, were more vulnerable to accidental damage, and were harder to repair aboard a ship, whereas wooden ones were easier to replace. His Lordship further stated that the steel booms that the Committee favoured were of a different type from those designed by Bullivant.[3]