812 EXPERIMENT STATION RECORD. [Vol.43 



of an area of 165,120 acres in south-central Georgia situated in the Coastal 

 Plain region. The prevailing topography is gently rolling to rolling, and in 

 general the drainage is fairly good. 



The upland soils are derived from unconsolidated sands, clay, and marl, and 

 the terrace and flood plain soils are of alluvial origin. Including svpamp, 16 

 soil types of 9 series are mapped, of which the Norfolk, Ruston, and Plummer 

 sandy loams cover 35.2, 12.2, and 10.2 per cent, respectively, of the area. 



Soil survey of Horry County, S. C, B. W. Tillman et al. (U. S. Dept. Agr., 

 Adv. Sheets Field Oper. Bur. Soils, 1918, pp. 52, fig. 1, maps 2).—T\iis survey, 

 deals with the soils of an area of 705,920 acres in northeastern South Carolina 

 lying within the flat imperfectly drained coastal portion of the Coastal Plain. 

 The surface of the county is predominantly level to undulating with a few low 

 ridges and knolls and some large flat areas. Surface drainage is fairly well 

 established in the northei'u and western portions, but throughout the flatter 

 eastern part there are large areas which are inadequately drained. 



The soils are prevailingly sandy in the surface portion and are under- 

 laid by sandy clay or friable clay subsoils. With a few exceptions, the soils 

 are light colored and deficient in organic matter. Including swamp, sand hill, 

 coastal beach, and tidal marsh, 31 soil types of 13 series are mapped, of which 

 swamp, Norfolk fine sand, and Norfolk fine sandy loam cover 20.3, 16.2, and 10.8 

 per cent of the area, respectively. 



A study of moisture movement in the soil {Kentucky Sta. Rpt. 1919, pt. 

 1, p. 24).— It was found that the distance through which moisture will move in 

 saturated sand, varying in fineness from 40 to 100 mesh, is approximately one 

 and two-thirds times the distance of movement through air-dry sand. 



A capillary transmission constant and methods of determining it experi- 

 mentally, W. Gakdneb {Soil Sci., 10 {1920), No. 2, pp. 108-126, figs. iO).— This 

 article is a contribution from the Utah Experiment Station, the first part being 

 a general theoretical discussion of soil-moisture movement, in which a capillary 

 transmission constant is defined on theoretical grounds which is similar to the 

 specific electrical conductivity of metals and to the specific thermal conduc- 

 tivity of heat conductors. Methods are described for the measurement of this 

 constant in the laboratory. 



Experimental data from various laboratory and field experiments at the 

 station gave transmission constant values under various conditions of porosity 

 ranging from —1.8X10"' for a very loose unpacked soil to — 8.7 XIO"' for a 

 field plat, with a mean value of —5.8X10"* c. g. s. units. 



An illustrative calculation is made indicating that approximately 12 in. of 

 water may be available from a 12-ft. water table in a period of 30 days. This 

 result was not corrected for the influence of gravity. 



The entire contribution emphasizes the method rather than the finality of the 

 results obtained. 



Hygroscopicity and hydrologic importance of moss, L. Piccioli {Stnz. 

 Sper. Agr. Ital., 51 {1918), No. 7-8. pp. S12-315). — Experiments to determine the 

 absorptive capacity of samples taken from thick carpets of 10 species of moss in 

 the natural state on forest soils are reported. As soon as gathered the moss 

 was soaked in water for half an hour, drained until it released no more water, 

 and then weighed. It was next dried in a well-ventilated place until the water 

 content was reduced to from 12 to 15 per cent and weighed again. It was 

 found that a square mile of steeply sloping land covered with moss may hold 

 and conserve from 91,500 to 275,000 cu. ft. of water which would otherwise be 

 wasted as run-off. 



The carbon dioxid of the soil air, H. W. Ttxrpin {New York Cornell Sta. 

 Mem., 32 {1920), pp. 319S62, figs. i7).— Following an historical review of th^ 



