. Contributions from the Osborn Botanical Laboratory. Plants. 39° George E. Nichols, 75 per cent, and sometimes fully 85 per cent, of the stand. Individual trees may attain a trunk diameter in excess of six- teen inches with a height approaching seventy feet, but such specimens are exceptional: the bulk of the balsams w^hich go to make up the mature forest run from eight to twelve inches in. Figure 49.—Primeval coniferous forest of the regional climax type; mainly balsam fir; mountains north of Barrasois River. diameter, mostly about ten, and range around fifty feet in height. The average age
. Contributions from the Osborn Botanical Laboratory. Plants. 39° George E. Nichols, 75 per cent, and sometimes fully 85 per cent, of the stand. Individual trees may attain a trunk diameter in excess of six- teen inches with a height approaching seventy feet, but such specimens are exceptional: the bulk of the balsams w^hich go to make up the mature forest run from eight to twelve inches in. Figure 49.—Primeval coniferous forest of the regional climax type; mainly balsam fir; mountains north of Barrasois River. diameter, mostly about ten, and range around fifty feet in height. The average age of such trees, as ascertained in many cases with the aid of an increment borer, would scarcely exceed seventy years. Occasional specimens are encountered which must be 125 or more years of age, but the exact age of these larger specimens it is seldom possible to determine accurately, owing. 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 Osborn Botanical Laboratory. [New Haven?] Osborn Botanical Laboratory, Yale University
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