SOILS FERTILIZERS. 717 



on meteorology and seismology, notes on the weatber of the months, a condensed 

 climatological summary, ami the usual climatulogiral tables aiul charts, those 

 numbers contain the following articles : 



No. 5. — Solar and Sky Kadiation Measured at Washington, D. C, during 

 May, 1915, by H. H. Kimball ; Confirmatory Experiments on the Value of the 

 Solar Constant of Radiation, by C. G. Abbot, F. E. Fowle, and L. B. Aldrich ; 

 Solar Halo of May 11, 1915, at Sand Key, Fla. (illus.), by C. G. Andrus ; Solar 

 Halo of May 20, 1915, at Philadelphia (illus.) ; Halo of May 20, 1915, at New 

 Haven, Conn., by C. S. Hastings; The Region of Greatest Snowfall in the 

 United States (illus.), by A. H. Talmer (see p. 716) ; The Effect of Weather 

 upon the Yield of Potatoes (illus.), by J. W. Smith (see p. 716) ; and Ice Condi- 

 tions in Danish Waters, A. D. 690-1860. 



No. 6. — Solar and Sljy Radiation Measured at Washington, D. C, during 

 June, 1915, by H. H. Kimball; Systematic Observation of Meteors, by S. A. 

 Mitchell ; Internal Reflection as a Source of Error in the Callendar Bolometric 

 Sunshine Receiver (illus.), by E. R. INIiller ; Rainfall and Agriculture in the 

 United States (illus.), by B. C. Wallis (see p. 715) ; A Revolving Cloud Camera 

 (illus.), O. L. Fassig; A Test for Personal Error in Meteorological Observations 

 (illus.), by E. R. Miller; Tlie Hottest Region in the United States, by G. H. 

 Willson (see p. 716) ; Summer Temperatures at Paris and at Reno, Nov., by 

 H. F. Alciatore ; Weather and Radium Emanation at Manila, P. I. ; Meteorolog- 

 ical Papers Presented at the Havre Meeting of the French Association ; The 

 Green Flash at Sunset, by A. W. Porter ; and Pernter and Exner on the Green 

 Flash. 



Meteorological observations at the Massachusetts Agricultural Experiment 

 Station, J. E. Ostkander and D. Potter (Mnssachusetts Sta. Met. Buls. 319, 

 320 {1915), pp. 4 each). — Summaries of observations at Amherst, Mass., on 

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

 casual phenomena during July and August, 1915, are presented. The data are 

 briefly discussed in general notes on the weather of each month. 



Meteorological records for 1913 and 1914, H. L. Price {Virginia Sta. Tech. 

 Bill. 8 {1915), pp. 165-169; Rpts. 1913-U, pp. 165-169) .—Detailed records of 

 tridaily thermometer readings and summaries of observations on temperature, 

 precipitation, cloudiness, and wind for each month of 1913 and 1914 are given. 



The United States Weather Bureau, H. E. Williams {U. S. Dept. Agr., 

 Weather Bur. IPamphlet], 1915, pp. 58, figs. 10). — A brief historical account 

 of the Weather Bureau is given and the nature and value of its work are con- 

 cisely explained. 



SOILS— FERTILIZERS. 



The development of the study of soils from its beginning to the twentieth 

 century, O. Neuss {Internat. Mitt. Bodenk., ^ {1914), No. 6, pp. 453-495) .—The 

 author presents a brief historical review covering certain of the more important 

 phases of the development of the study of soils from the time of the early 

 Greeks and Romans. 



McLean County soils, C. G. Hopkins, J. G. Mosier, E. Van Alstine, and 

 F. W. Gakkett {Illinois Sta. Soil Rpt. 10 {1915), pp. 52, pis. 4, figs. 8).— This 

 is the tenth of the series of the Illinois county soil reports. 



McLean County lies in central Illinois in the early Wisconsin glaciation. The 

 general topogi-aphy is undulating to slightly rolling. The soils of the county 

 are divided into four classes as follows : (1) Upland prairie soils, rich in organic 

 matter, (2) upland timber soils containing much less organic matter, (3) terrace 

 soils, and (4) swamp and bottom lands. The brown silt loam of the upland 



