1 '-'«1 SOILS — FERTILIZERS. 511 



\o. S. — lU'latioii of ClmiiKes in .Storm Tiiles on the Coast of the Culf of 

 .Mexico to the Center and Movement of Hurricanes (illus.), by I. M. Cline; 

 1 >iscrei>ancies between Angstrom and Smitiisonian Instruments, by C. <!. 

 Ai)bot ; Foiecasting tlie Weather on Sliort-period Solar Variations, by C. F. 

 Marvin ; The Agricultural Significance of Sunshine as Illustrated in ('uli- 

 fornia (illus.), by A. H. Palmer (see p. HOD) ; I'roject for Local Forecast Studies, 

 by U. H. Weiglitniaii ; Mackerel Sky as a Prognostic of Precipitation, by H. H. 

 .'Nhirtin; The Drought in California, by A. H. Palmer; " Snowbiill " Hail at 

 Toi)eka, Kans.. Mi;rch 3, 1920, by S. D. Flora; and Hailstorm of .March 3, 

 1920, at Broken Arrow, Okla., by J. W. Arnold. 



No. 4.— The Thirteen Tornadoes of March 28, 1920 (illus.) ; The Four 

 Tornadoes of April 20, 1920 (illus.) ; Tornado in Union County, N. C, April 

 12, 1920, by G. S. Lindgi-en ; Tornadoes in Northeastern C)klahoma, May 2, 

 1020; by J. A. Kejhle; The Hailstorm of April 8, 1920, in Washington County, 

 Ala., by P. II. Smyth; Cloudiness in New York State (illus.), by E. S. Chiwes; 

 Modifying Factors in Effective Temperature, or, a Principle of Modilied 

 Thermal Intlnence on Organisms, by A. D. Hopkins (see p. HOO) ; Climatic Con- 

 ditions ill a Greenhouse as Measured by Plant Growth, by E. S. Johnston; The 

 Distribution of Maximum Floods — Discussion; and Sonie Meteorological Obser- 

 vations of a Bombing Pilot in France, by T. R. Reed. 



Cliniatoloffical data for the United States by sections (U. S. Dcpt. Ayr., 

 Weather Bur. ('liiiiat. Data, 6 (IDJ'J). Kos. 11, pp. [222], pis. 2, figs. //; 12, pp. 

 [228], plii. 3, fiys. 3). — These volumes contain brief summaries and detailed 

 tabular statements of climatological data for each State for Noveniber and 

 December, 1019, resi)ectively. 



Meteorological obserA'atloiis at the Massachusetts Agricultural E.\peri- 

 ment Station, .1. K. Ostu.\ni)kr, G. S. Smith, and G. E. Lindskog (ilassacJin- 

 setts Sta. Met. Jiul.'i. 377-318 {1920), pp. 4 each). — Summaries of observations 

 at Amlierst, Mass.. on pressure, temperature, humidity, precipitation, wind, 

 sun.shine, cloudiness, and casual phenomena during May and June, 1920, are 

 i)resented. The data are briefly discussed in general notes on the weather of 

 each month. 



Meteorology, W. Fkkau, H. r». Edmiston, and C. A. Kkun {Pennsylvania Sta. 

 apt. I'JUj, pp. .'/87-520, o79-()00). — The usual observations on pressure, temper- 

 ature, precipitation, doudines.s, and frostless period at State College, Pa., 

 are summarized for 1915 as in previous reports (E. S. R., 38, p. 13). There 

 are also special .sunnnaries on the following topics: The daily course of 

 temperature; excessive temperature changes for sliort periods; sunshine rec- 

 ords; distribution of precioitation during tlie growing season, 191"); wind 

 velocity records, 1915; and wind direction. 



SOILS— FERTILIZERS. 



Soil survey of Shelby County, Ala., J. F. Sthouo, H. C. S.mith, and J. H. 

 Agke {U. S. Dept. Ayr., Adv. Sheets Field Oper. Bur. SoUs, 1917, pp. 60, fly. 1, 

 map 1). — This survey, made in cooperation with the State of Alabama, deals 

 with the soils of an area of 513,920 acres situated just north of the center of 

 Alabama. The topography ranges from mountainous and rough to rolling and 

 flat. 



The soils fall naturally into four soil provinces. The most extensive is the 

 Appalachian Mountain province. The second division in point of area and the 

 first in agricultural importance is the Limestone Valleys and Uplands province. 

 The other two provinces in order of area are the Kiver Flood Plains and Coastal 

 Plains provinces. 



