. Carnegie Institution of Washington publication. MAY 20 1919 -aa- •APRIL 15 1919. FIG. 9.—Dendrographic records of Chihuahua pine, with variations X 5 on 10 mm. intervals. Some enlargement shown in week beginning April 15, 1919; shrinkage during week beginning May 20; enlargement in week beginning May 28; daily equalizing variations of wide amplitude in week beginning June 13; reduced variations and shrinkage in week beginning July 11; increased variations and actual increases in diameter in week beginning August 16, and reduced daily variations in late October. which in 6 days amounted to 1
. Carnegie Institution of Washington publication. MAY 20 1919 -aa- •APRIL 15 1919. FIG. 9.—Dendrographic records of Chihuahua pine, with variations X 5 on 10 mm. intervals. Some enlargement shown in week beginning April 15, 1919; shrinkage during week beginning May 20; enlargement in week beginning May 28; daily equalizing variations of wide amplitude in week beginning June 13; reduced variations and shrinkage in week beginning July 11; increased variations and actual increases in diameter in week beginning August 16, and reduced daily variations in late October. which in 6 days amounted to 1 mm., or half the total increase during the previous two months. Increase began on May 28, which amounted to about 2 mm. on June 14, at which time equalizing variations began at tree temperatures of 23° to 27° C., which continued until June 28. Now, in the extreme hot mid-summer, shrinkage began which con- tinued until July 20, or until about 3 weeks after the summer rains began. During this time a shrinkage of about 2 mm. had ensued, which was equivalent to about three-fourths of the gain up to^ this date. A period of increase, ending August 23, resulted in a gain of. 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 Washington. Washington, Carnegie Institution of Washington
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