812 EXPERIMENT STATION RECORD. [Vol. 3S 



No. 12.— 'Lxmar Total Eclipse, 1917, July 4, by L. Picard (reprinted abs.) ; 

 Lunar Total Eclipse of December 27-28, 1917, at Honolulu, by C. A. Reichelt ; 

 Permanent Periodicity of Sun Spots, by J. Larmor and N. Yamaga (reprinted 

 abs.) ; Polarization of Slsylight, by A. Goclie] (abs.) ; Solar Coronce: Five Years' 

 Recent Observations, by J. Maurer (abs.) ; Need of Geophysical Observing Sta- 

 tions, by P. Gruner (abs.) ; West Indies Hurricanes as Observed in Jamaica 

 (illus.), by M. Hall; The Settlement of Tropical Australia (illus.), by G. Taylor 

 (reprinted) ; Practical Hint in Forecasting Minimum Temperatures, by W. G. 

 Reed ; Meteorology and War-Flying, by R. DeC. Ward ; Waterspouts ^"isit 

 Tatoosh Island, Wash., by R. C. Mize; Meteorology of Greenland's Inland Ice 

 and Its Foehn, by A. de Quervain (abs.) ; Variations of Alpine Glaciers, by 

 P. L. Mercanton (reprinted al)s.) ; Aqueous Exchange between the Neve and 

 the Atmosphere, by R. Bilhviller (abs.) ; Use of Monthly Mean Values in 

 Climatological Analysis, by E. G. Bilham (reprinted abs.) ; Bathyrheonieter as 

 Anemometer, by Y. Delage (abs.) ; Nitrites from Nitrates by Sunlight, by B. 

 Moore (reprinted abs.) (see p. 811) ; Centennial of Meteorological Station at the 

 Grand Saint-Bernard, by R. Gautier (abs.) ; Time Zones at Sea (reprinted 

 abs.) ; Baron Dairoku Kikuchi, 1855-1917, by T. C. Mendenhall ; Rollin Arthur 

 Harris, Ph. D., 1SG3-1918 ; and Recent Distinctions in Meteorology. 



Meteorolog'ical observations at the Massachusetts Agricultural Experiment 

 Station, J. E. Ostkander and A. L. Chandler {Massachusetts Sta. Met. Buls. 

 S40-350 {1918), pp. 4 each). — Summaries of observations at Amherst, Mass., on 

 pressure, temperature, humidity, precipitation, wind, sunshine, cloudiness, and 

 casual phenomena during January and February, 1918, are presented. The 

 data are briefly discussed in general notes on the weather of eaoli month, 



SOILS— FERTILIZEIIS. 



Soil survey of Hempstead County, Ark., A. E. Tayt^or and W. B. Corb 

 (U. S. Dept. Ayr., Adv. Sheets Field Oper. Bur. Soils, 1916, pp. 53, fig. 1, map 

 1 ) . — This survey deals with the soils of an area of 465,280 acres in southwestern 

 Arkansas lying entirely within the Coastal Plain province. The topography is 

 generally undulating to gently rolling, the area being well drained, although 

 there are rather extensive level, poorly drained sections consisting of broad 

 flood plains and river terraces. 



About 75 per cent of the soil material of the county is residual in origin, the 

 remainder being of alluvial origin. Thirty-three soil types of twenty series 

 are mapped. Ruston fine sandy loam and Ruston very fine sandy loam pre- 

 dominate, occupying 15.8 and 12.1 per cent of the total area, respectively. 



Soil survey of rillmore County, Nebr., A. H. Meyer, C. E. Collett, and 

 N. A. Bengtson {U. S. Dept. Agr., Adv. Sheets Field Oper. Bur. Soils, 1916, 

 pp. 24, pi. 1, fig. 1, map 1). — This survey, made in cooperation with the State 

 of Nebraska, deals with the soils of an area of 308,640 acres in the southeastern 

 part of the State lying entirely within the loess-covered portion of the Great 

 Plains province. The topography of tlie county ranges from almost flat to 

 slightly undulating, with a small area of terrace and bottom land along the 

 streams. The region as a whole is well drained. ' 



The soils of the county are derived from loess material, glacial drift, and 

 alluvial and lacustrine .deposits. Seven soil types of six series are mapped, 

 Grundy silt loam occupying 87.4 per cent of the total area. 



Water extractions of soils as criteria of their crop-producing power, J. S. 

 BxmD (U. S. Dept. Agr., Jour. Agr. Research, 12 (1918), No. 6, pp. 297-309, fig. 

 1). — On the basis of investigations at tlie California Experiment Station on 

 extractable su))stances (nitrate, phosphate, and basic ions — K, Ca, and Mg) in 



