. Carnegie Institution of Washington publication. THE CORRECTION AND COMPARISON OF CURVES OF GROAVTH. 133 diminish the rate of growth of those that remain living. Nevertheless, our 17 curves appear to have l)een little iuflueuced in this way. In the first place, previous to the com- ing of Europeans and to the introduction of locomotives, fires were probably not one-tenth as numerous as now; they were due either to lightning or to the carelessness of the Indians. i;«io. Tulip Poplar i White Oak .--l Kud Spnice Spi'uce ,â¢â 'â â¢,.., â¢â¢â I ,. ,, Douglas Fir .⢠'" â â¢'Red Fir'&
. Carnegie Institution of Washington publication. THE CORRECTION AND COMPARISON OF CURVES OF GROAVTH. 133 diminish the rate of growth of those that remain living. Nevertheless, our 17 curves appear to have l)een little iuflueuced in this way. In the first place, previous to the com- ing of Europeans and to the introduction of locomotives, fires were probably not one-tenth as numerous as now; they were due either to lightning or to the carelessness of the Indians. i;«io. Tulip Poplar i White Oak .--l Kud Spnice Spi'uce ,â¢â 'â â¢,.., â¢â¢â I ,. ,, Douglas Fir .⢠'" â â¢'Red Fir'""' â¢. Sugar Pine â â¢-'â â Short Leaf Pine Yellow Pine Coast Red 197 Sequoia washingloniana California 177 Pinus jelTreyi S. California 107 Liriodendron West Virginia 72S Qucrcus alba West Virginia 163 Picea rulira Maine 325 Picea sp. West Virginia 29 Pseudotsuga taxifulia Idaho 217 Pinus ponderosa Idaho lis Abies magnilica California 31 Pinus lambertiana S. California 32 Pinus ponderosa S. California 73 Abies magnifica Idaho 26 Quercus alba Missouri 245 Pinus echinata Arkansas 72 Pinus ponderosa New Mexico 227 Sequoia sempervu-ens California 4i; Fagns grandifolia. New York Fig. 31.âCurves of Growth of American Trees. (See Table H. pp. 325-327.) The Indians, however, were few in number, and, according to all accounts, generally took great care to extinguish their fires or to kindle them in places where they could not spread. Still, even in their day, there must have been a certain number of fires, and traces of these can sometimes be seen in charred spots far toward the center of a great tree. These fires must have produced effects which are apparent in some of our curves. On the whole,. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Carnegie Institution of Wash
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