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A modified Lowry protein test for dilute protein solutions modified Lowry protein test was compared with the standard Lowry protein test. The modified test was found to give estimates of protein concentration that were as good as the standard test and has the advange that proteins can be measured in very dilute solutions.

Two makes of power mulchers were evaluated for their ability to apply raw or processed hardwood bark mulch for use in revegetating disturbed soils. Tests were made to determine the uniformity of bark coverage and distance to which coverage was obtained. Moisture content and particle-size distribution of the barks used were also tested to determine whether or not these factors limited machine performance.

Suggestions for preparing a symposium paper for publication, including length, general style, manuscript format, and details of handling tables, illustrations, footnotes, literature references, etc. Also suggestions for typing.

Simple correlation coefficients between various characteristics of sugar maple trees and sap sugar concentration, sap volume yield, and total sugar production are given for the 1968 sap season. Correlation coefficients in general indicated that individual tree characteristics that express tree and crown size are significantly related to sap volume yield and total sugar production. However, there was little evidence of a strong relationship between such tree characteristics and sap sugar concentration. Correlations presented were for one sap season only.

The vegetation on campsites in the Adirondacks was measured and mapped, and changes in vegetation on the sites were studied from 1964 to 1969. Results indicate that well-maintained sites deteriorated little during the study period.

Growth of K-31 tall fescue (Festuca arundinacea) was significantly affected by the particle-size distribution, or texture, of four spoils from eastern Kentucky. Growth on spoils having no toxic chemical properties generally was greatest where texture consisted of about equal quantities of soil-size material and a coarser fraction (2 mm. to 6.4 mm.), probably because moisture and aeration were favorable. However, on two spoils, adverse chemical properties modified the effect of physical properties associated with texture. Toxic levels of Mn found in the smaller-size fractions probably...

Observations on sound propagation were made in two red pine plantations. Measurements were taken of attenuation of prerecorded frequencies at various distances from the sound source. Sound absorption was strongly dependent on frequencies. Peak absorption was at 500 Hz.

Daily expenditures by families camping in New Hampshire State parks in 1967 averaged $11.81. Considerable variation was found between the northern, central, and southern regions of the State in both the average amount of money spent and the way in which the money was spent. Daily expenditures in the north were higher, but average visit lengths were shorter, resulting in less local spending per family. The ratio of campground visit length to total trip length is shown to vary with several categories of trip expenditure. Campers who spent all or most of their trip at one campground spent...

We studied the consistency of refractometer sugar readings as influenced by sap evaporation, temperature, and the drying, cleaning, and calibration of the instrument. From the study results, we suggest field procedures for using the refractometer to insure reliable measurements.

This annual report is based on a canvass of all pulpmills in the Northeast that use wood-either roundwood or plant residues-as a basic raw material for a variety of products. Mills that use pulpwood as a raw material in producing insulation board and hardboard were also included in the canvass. The statistics for production from roundwood reported in this bulletin are based upon mill receipts, which are subject to fluctuations caused by uneven wood-inventory buildups or liquidations from year to year. The plant residues are received at the pulpmill mostly in chip form; however, some coarse...