`huron` <-
structure(list(year = c(1860, 1861, 1862, 1863, 1864, 1865, 1866, 
1867, 1868, 1869, 1870, 1871, 1872, 1873, 1874, 1875, 1876, 1877, 
1878, 1879, 1880, 1881, 1882, 1883, 1884, 1885, 1886, 1887, 1888, 
1889, 1890, 1891, 1892, 1893, 1894, 1895, 1896, 1897, 1898, 1899, 
1900, 1901, 1902, 1903, 1904, 1905, 1906, 1907, 1908, 1909, 1910, 
1911, 1912, 1913, 1914, 1915, 1916, 1917, 1918, 1919, 1920, 1921, 
1922, 1923, 1924, 1925, 1926, 1927, 1928, 1929, 1930, 1931, 1932, 
1933, 1934, 1935, 1936, 1937, 1938, 1939, 1940, 1941, 1942, 1943, 
1944, 1945, 1946, 1947, 1948, 1949, 1950, 1951, 1952, 1953, 1954, 
1955, 1956, 1957, 1958, 1959, 1960, 1961, 1962, 1963, 1964, 1965, 
1966, 1967, 1968, 1969, 1970, 1971, 1972, 1973, 1974, 1975, 1976, 
1977, 1978, 1979, 1980, 1981, 1982, 1983, 1984, 1985, 1986), 
    mean.height = c(581.56, 581.55, 581.34, 580.84, 580.33, 580.35, 
    579.87, 580.49, 579.91, 580.07, 580.91, 581.1, 579.72, 580.32, 
    580.48, 580.38, 581.86, 580.97, 580.8, 579.79, 580.39, 580.42, 
    580.82, 581.4, 581.32, 581.44, 581.68, 581.17, 580.53, 580.01, 
    579.91, 579.14, 579.16, 579.55, 579.67, 578.44, 578.24, 579.1, 
    579.09, 579.35, 578.82, 579.32, 579.01, 579, 579.8, 579.83, 
    579.72, 579.89, 580.01, 579.37, 578.69, 578.19, 578.67, 579.55, 
    578.92, 578.09, 579.37, 580.13, 580.14, 579.51, 579.24, 578.66, 
    578.86, 578.05, 577.79, 576.75, 576.75, 577.82, 578.64, 580.58, 
    579.48, 577.38, 576.9, 576.94, 576.24, 576.84, 576.85, 576.9, 
    577.79, 578.18, 577.51, 577.23, 578.42, 579.61, 579.05, 579.26, 
    579.22, 579.38, 579.1, 577.95, 578.12, 579.75, 580.85, 580.41, 
    579.96, 579.61, 578.76, 578.18, 577.21, 577.13, 579.1, 578.25, 
    577.91, 576.89, 575.96, 576.8, 577.68, 578.38, 578.52, 579.74, 
    579.31, 579.89, 579.96, 580.98, 581.04, 580.49, 580.52, 578.57, 
    578.96, 579.94, 579.77, 579.44, 578.97, 580.08, 580.23, 580.75, 
    581.27)), .Names = c("year", "mean.height"), row.names = c("1", 
"2", "3", "4", "5", "6", "7", "8", "9", "10", "11", "12", "13", 
"14", "15", "16", "17", "18", "19", "20", "21", "22", "23", "24", 
"25", "26", "27", "28", "29", "30", "31", "32", "33", "34", "35", 
"36", "37", "38", "39", "40", "41", "42", "43", "44", "45", "46", 
"47", "48", "49", "50", "51", "52", "53", "54", "55", "56", "57", 
"58", "59", "60", "61", "62", "63", "64", "65", "66", "67", "68", 
"69", "70", "71", "72", "73", "74", "75", "76", "77", "78", "79", 
"80", "81", "82", "83", "84", "85", "86", "87", "88", "89", "90", 
"91", "92", "93", "94", "95", "96", "97", "98", "99", "100", 
"101", "102", "103", "104", "105", "106", "107", "108", "109", 
"110", "111", "112", "113", "114", "115", "116", "117", "118", 
"119", "120", "121", "122", "123", "124", "125", "126", "127"
), class = "data.frame")