Treesearch

Although infrequently used, the trough-type rain gage has been described as aerodynamically the most efficient of gages (Hayes and Kittredge 1949). This applies only to the commercial semicircular eave-gutter type of trough and not to troughs rectangular in cross-section. The latter, as well as the upright cylindrical type of gage, produces greater disturbances in the rain-bearing wind stream.

The automatic recording of wind movement is sometimes essential to experiments in forestry and watershed-management research. Wind-movement data are often obtained by periodic reading of the anemometer dial, but occasionally data are required for variable intervals and at times when observations cannot be made easily. Instruments designed to record wind movement are being manufactured, but they are multiple-stage recorders and are expensive. To our knowledge, no instrument is made for the sole purpose of recording wind movement. So we devised an easy and inexpensive way to convert any...

The name "Collar crack" is suggested for a condition of birches observed in the past 4 years during field studies of forest disease problems in the White Mountains of New Hampshire. The first close observations of this condition were made during the summer of 1963. This is a report on those observations and an explanation of the possible cause.

In April of 1953 the Lake States Forest Tree Improvement Committee was formed, following a regional conference sponsored by the Lake States Forest Experiment Station. Since that time there has been a marked increase in the amount of tree improvement work done in this region, and the Committee has performed a valuable service in encouraging and coordinating such activities. Since that first conference, the Lake States Forest Tree Improvement Committee has conducted regional tree improvement conferences biennially. For each conference there has been a proceedings, and the Station has...

To provide up-to-date information about the forest resources of the Nation, the Forest Service, U. S. Department of Agriculture, conducts a series of continuing forest surveys of the various states. This is a report on the latest forest resurvey of West Virginia, made by the Northeastern Forest Experiment Station. It supersedes a report published in 1952, which contained forest-resource data based on an earlier survey made by the Northeastern Station. In this resurvey, a scientifically designed sampling system, partly based upon remeasured plots, was used. Data were collected and analyzed...