. Carnegie Institution of Washington publication. FIG. 5.—Dendrographic records of the changes in the trunk of a Monterey pine made by the two instruments attached to No. 1, as in fig. 4. Record A is from the lower part of the trunk and B from the higher point, for the week beginning May 3, 1920. The sheet is marked into 6-hour periods and the spaces represent 10 mm., the actual changes in the trunk being X 8. Enlarge- ment and partially equalizing daily variations are displayed. JUNE 28 1920 GPM 6AM 6PM GAM GPM GAM 6PM 6AM GPM GAM GPM GAM GPM GAM. JUNE 28 1920 6PM 6AM- GPM GAM, GPM GAM 6PM 6A
. Carnegie Institution of Washington publication. FIG. 5.—Dendrographic records of the changes in the trunk of a Monterey pine made by the two instruments attached to No. 1, as in fig. 4. Record A is from the lower part of the trunk and B from the higher point, for the week beginning May 3, 1920. The sheet is marked into 6-hour periods and the spaces represent 10 mm., the actual changes in the trunk being X 8. Enlarge- ment and partially equalizing daily variations are displayed. JUNE 28 1920 GPM 6AM 6PM GAM GPM GAM 6PM 6AM GPM GAM GPM GAM GPM GAM. JUNE 28 1920 6PM 6AM- GPM GAM, GPM GAM 6PM 6AM GPM GAM GPM GAM 6PM f\ f\ £. -«~ +. — - — • — --*. — — • — • — — ^, ~-—^- • ~ _ • •• , -^-— • f. _— — — • . ' ^ — •~^^. ^- — ' \ — 3000 Tr\ gals 4Yn\v g FIG. 6.—Equalizing daily variations of trunk of Monterey pine No. 1 for week beginning June 28, 1920. Application of water to soil around roots after 6 p. m. on July 2 was followed by upward course of record lines from both instruments. Variations X 8 on 10 mm. scale. greater at the lower instrument (fig. 6). Additional water was given on each of the 2 days following, and enlargement continued at the upper instrument until about August 16. During this period of 16 days an enlargement of 2 mm. in diameter had taken place at the upper instrument, 9 meters above the ground, and of 4 mm. at the lower instrument, 1 meter above the ground (fig. 7). Enlargement at the base continued until September 15, at which time a further thick- ening of 2 mm. had taken place, making a total thickening of 9 mm. at the base. Both measurements were in agreement with borings taken in January and February 1921. Then followed a month 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 Washingto
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