the Committee of the Section of Machinery of the Exhibition of 1851 (March 11, 1850)

445 58. Extract from Report of the Jury of Class VII. of the Exhibition of 1851 on Sir Joseph Paxton’s Design for the Building 447 59, 60, 61. Letters to Westley Richards, Esq., on the Polygonal Rifle (October 25, 1852; February 7, 1853; November 26, 1858) 450-1 62. Extract from Letter to James Nasmyth, Esq., on the Construction of Large Guns (April 2, 1855) 452 63. Extract from Letter to W. G. Armstrong, Esq., on the Wire Gun (June 8, 1855) 454 64. Memorandum on the Floating Gun-Carriage (December 20, 1855) 455   The principle is fixing a very heavy gun in a floating shot-proof chamber (p. 455)—Mode of working the gun (p. 455)—Mode of manœuvring the vessel (p. 456)—Mode of attacking the Baltic forts with a fleet of such vessels (p. 457)—Thickness of iron required to make the vessel shot proof (p. 458)—Best manner of constructing the vessels (p. 458). 65. Letter to the Secretary of the Admiralty on the Floating Gun-Carriage (July 27, 1855) 459 66. Memorandum on Renkioi Hospital Buildings (March 1855) 463   Necessary conditions in designing these buildings (p. 463)—General description of them (p. 463)—Closets and lavatories (p. 464)—External and internal covering (p. 464)—Ventilation (p. 464)—Kitchens (p. 465)—Drainage (p. 466)—Officers’ quarters (p. 466)—Transport of materials (p. 466)—Portable baths (p. 467)—Cost of buildings (p. 467). 67. Letter on the Direction of Railway Works (March 4, 1845) 475 68. Letter on the Position of Joint Engineer (October 16, 1843) 476 69. Letter on the Position of Consulting Engineer (December 30, 1851) 477 70. Letter on the Position of the Engineer in relation to the Contractors (May 26, 1854) 477 71, 72, 73. Extracts from Letters on the Relations between the Engineer and the Directors (April 15, 1850; December 6, 1851; Jan. 22, 1857) 478-481 74, 75, 76. Extracts from Letters on Interference of Directors with the Assistant Engineers (January 19, 1842; January 28, 1842; December 12, 1851) 481-3 77. Extract from Diary (May 5, 1846) 485 78. Letter to an Inventor (September 17, 1847) 486 79. Letter on the Royal Commission on the Application of Iron to Railway Structures (March 13, 1848) 486 80. Letter on a Proposal to obtain Recognition in England of Decorations conferred at the Paris Exhibition of 1855 (Feb. 9, 1856) 489 81. Memorandum for Evidence before the Select Committee of the House of Lords on the Patent Laws, A.D. 1851 490   He has had large experience of the patent laws (p. 490)—Has never taken out one, and is of opinion that the system is productive of immense evil (p. 491)—Reasons for this belief (p. 491)—Conditions necessary for a successful patent (p. 493)—Disadvantages of patents (p. 494)—Impediments in the way of improvements (p. 495). 82. Extract from Observations on the Patent Laws made by Mr. Brunel at a Meeting of the Society of Arts (March 28, 1856) 497 83. Letter from Philæ, describing the Ascent of the Cataracts (February 12, 1859) public@vhost@g@gutenberg@html@files@41210@[email protected]#page_517"