Harvey, Mr.Henry,23,48,52,64,88,101,152,154,188,189,257,298,301,302,303,356,361,385.Harvey, Mr.Nicholas,295.Hawkins, Mr.,395.Hawkins, Sir C.,16,36,39,40,45,47,54,61,171.Hayle Harbour,335.Hazeldine, Mr.,52,66,151,204,215.Hearse-boiler,155,157,163,180,308.Heat lost,7.Heating apparatus,363.Henwood, Mr.,180,185,245,360,386.Herland,31,74,83,87,91,96,99,101,105,114,118,308,310.High pressure,19,109,119,148,150,198,271,310,376.Hill, Mr.,133.Hodge, Captain,246,249.Holland,110,296,299,317,333,369.Holman, Mr.,87.Homfray, Mr., 4,125,128,132,134,139,140.Horizontal cylinder,19,28.Hornblower,117,170.Horse-power,36,42.Hot blast,11.Hot-house,133.Hot-house store,363.Howard, Mr.,390.Hume, Joseph,390.Husband, Mr.,385.Hydraulic crane,385.I.Ice making,294.Illness,363,388.Illogan,228.Incline,267,269.Injection,19,324.Invoice,220.Iron furnace,8.Iron ships,286,297,299,317.J.Jamaica,277.Jasper, Mr.,39,66.Jeffry, Richard,159,176.Jenkin, Mr.,83,118,166.Joaquin de la Pezula,233,237.Johnstone, Captain,375.José Gonzales de Prada,236.José Lago y Lemus,234.Juan Mora River,266.Judson, Mr.,247.K.Kendal, Mr.,39,59.Kenny, Captain,107,228,231.King, Captain,356,361.L.'La Belle Machine,'189.Law proceedings,148,150.Lean, Mr.,117,160,164.Lean, Mr.John,317.Legassack,102.Leith, Captain,230.Letters,—Edmonds, Mr. Richard,106;228, Aug. 20, 1817;305, Nov. 7, 1827;305, Jan. 24, 1828;306, Jan. 12, 1853;Fairbairn, Mr. James,272, Nov. 27, 1864;Gerard, Mr.,273, Nov. 17, 1827;280, Jan. 13, 1826;286, Feb. 21, 1828;Gilbert, Davies,10, Jan. 20, 1811;93, Feb. 15, 1816;312, Dec. 25, 1831;388, Dec. 26, 1831;Hall, Mr. B. N.,273, Dec. 16, 1864;Harvey, Mr.,23, Nov. 26, 1812;101, April 18, 1816;154, Aug. 26, 1810;Hawkins, Sir C.,39, March 19, 1812;Homfray, Mr.,137, Dec. 26, 1804;139, Jan. 2, 1805;Liddell, Captain,250, Nov. 3, 1869;Smith, Mr. T.,67, March 26, 1870;Thomas, Captain C.,162, March 29, 1858;Trethuoy, Mr. W.,68, May 17, 1872;Trevithick, Richard,2, Sept. 23, 1804;6, Jan.13, 1811;12, March 5, 1812;16, Dec. 5, 1812;16, April 28, 1812;18, Dec. 7, 1812;22, Nov. 8, 1812;24, Jan. 29, 1813;27, Feb. 4, 1813;28, Feb. 4, 1813;30, March 14, 1814;31, Dec. 9, 1815;33, Aug. 19, 1813;33, March 8, 1816;36, Feb. 13, 1812;41, April 26, 1812;45, May 1, 1812;47, June 13, 1812;49, June 17, 1812;50, July 5, 1812;51, Oct. 16, 1812;54, Jan. 26, 1813;59, Jan. 26, 1813;61, March 15, 1813;61, Aug. 19, 1813;80, July 8, 1815;86, Sept. 12, 1815;87, Sept. 29, 1815;88, Dec. 13, 1815;89, Dec. 23, 1815;91, Feb. 11, 1816;94, March 8, 1816;96, March 8, 1816;98, March 7, 1816;99, April 2, 1816;124, Oct. 1, 1803;128, Jan. 5, 1804;132, July 5, 1804;141, Feb. 18, 1806;145, March 4, 1806;146, March 21, 1806;171, March 10, 1812;173, March 27, 1813;193, May 20, 1813;198, May 22, 1813;199, June 2, 1813;200, June 8, 1813;201, June 11, 1813;202, June 19, 1813;203, June 23, 1813;204, Sept. 4, 1813;205, Sept. 7, 1813;206, Sept. 22, 1813;206, Oct. 1, 1813;207, Oct. 11, 1813;209, Oct. 23, 1813;212, Dec. 28, 1813;212, March 4, 1814;240, Feb. 15, 1817;243, Nov. 1817;251,277, Nov. 15, 1827;281, Jan. 24, 1828;286, Feb. 21, 1828;289, April 19, 1830;292, June 18, 1828;294, June 29, 1828;295, July 31, 1828;303, Sept. 14, 1829;305, Jan. 24, 1828;306, Dec. 20, 1827;311, Dec. 24, 1831;315, Dec. 14, 1828;323, Dec. 30, 1828;332, July 27, 1829;335, Nov. 5, 1829;336, Nov. 14, 1829;339, Aug. 19, 1830;363, March 1, 1830;368, Jan. 24, 1829;372, June 10, 1830;Vivian, Captain A.,150, May 30, 1806;Williams, Mr. M.,111, Jan. 5, 1853;Williams, Messrs.,304, Nov. 14, 1820.Liberality,49.Liberty, Wheal,39.Liddell, Captain,250.Lima,31,32,64,80,195,206,217,218,224,226,240,247,249,271.Linthorn, Mr.,292.Locomotive,23,26,27,39,41,43,48,50,126,133,206,217,271,374,379,387,388.Logan, Dr.,40.London engine,5.Losh, Mr.,95.Low pressure,76,140,148,157,179,180,192,395.Lowe, Mr.,277.Lowndes, Lord,287.M.Machuca,262.Magdalena,272.Man and his Man,361.Manchester,3,138,139.Man's power,42.Marazion,180.Marratt, Mr.,129.Matina,265,267.Maudslay, Mr.,375.Mellinear Mine,75.Melville, Lord,24,361.Meux's Brewery,111.Miers, Mr.,247.Mills, Mr.,339,375.Mint engine,32,201,209,217,227,239,240,243,247.Mitchell, Mr.,137.Model,197.Momentum,20,85,91,145,149.Mont Cenis,26,293.Montelegre, Mr.,269.Montelegre River,266,279,280.Moore, Dr.,34.Morley, Earl of,390.Moyle, Captain M.,307.Mule-power,45,47,201.Murdoch,105,118,125,126.N.Nankivill, Mr.,38.Navy Board,17,41,47,372.Neath Abbey,154,199.Nelson, Lord,121.Neville, Mr.,157,187.New Steam Navigation Company,383.Newcastle-upon-Tyne,3.Newcomen,83,114,121,157,175,211,300,319,328.Nicaragua Lake,269.Norfolk, Duke of,390.Number of engines,14,148.O.Oats, James,111.Odgers, Captain,98.Open-top cylinders,19,60,208,210,211,300,363.Oval tube,21,153.P.Paddle-wheel,384.Padre Arias Mine,262.Padstow engine,18,27,29.Page, Mr.,98,99,212,214,231,241.Palmer, General,390.Pape, Mrs.,66.Parallel motion,39.Patent laws,48,128,304.Patents,343of 1831;366of 1831;376of 1832.Paynter, Mr.,280.Penponds,158.Penydarran,132.Perceval, Mr.,108.Perrier, Mr.,188.Peru,210,221,252.Petition to Parliament,306,374,388.Phillip, Mr.,89,96,99.Phillips, Henry,90.Pickwood, Mr.,47.PinneysandAmes,33,49,50,51,63.Pinto, Don Antonio,280.Ploughing by steam,40,54,67.Plummer, Barham, and Co.,49.Plunger-pole pump,119,198.Plymouth Breakwater,22,23,25,27,29,30,54,195.Plymouth Dockyard,361.Pneumatic elevator,392.Poldice,103.Pole-engine,31,69,80,83,90,92,99,102,176.Pole, Professor,179.Pooly, William,158.Population,44,265.Portable engine,1,5,17,22,39,50,54,170,220,309,368,370,374.Power of engine,14,27,42,72,76,80,86,100,115,121,143,148,210,211,333.