618 EXPERIMENT STATION RECORD. [Vol. 35 



Weather and the yield of com (U. S. Dept. Agr., Nat. Weather and Crop 

 Bui. llf (1916), p. 2. fly. 1). — The relation between the yield of corn and the 

 rainfall in Ohio, Indiana, Illinois, Iowa, Nebraska, Kansas, Missonri, and Ken- 

 tucky for the 28 years from 1888 to 1915, inclusive, is shown in a diagram and 

 briefly discussed. The most striking fact brought out is that whenever the rain 

 for July has been above the normal the yield was above the normal in every 

 instance. Whenever the rainfall was below the normal the yield has also been 

 below in every year except five. 



The four greatest com States ( U. S. Dept. Agr., Nat. Weather and Crop 

 Bui. 15 {1916), p. 2, fig. 1). — It is shown that the average yield of com for 

 Indiana, Illinois, Iowa, and Missouri is 32 bu. per acre, and that the average 

 July rainfall for the region covered by these States is 3.9 in. The preeminence 

 of these States in corn production is shown to be closely correlated with the July 

 rainfall. 



Rainfall and temperature and corn yield (U. S. Dept. Agr., Nat. Weather 

 and Crop Bui. 18 {1916), pp. 2, 3, fig. i).— The effect of July rainfall and tem- 

 perature on the yield of corn in Ohio during the period from 1854 to 1915, inclu- 

 sive, is shown in a diagram and briefl.y discussed. The July rainfall is shown to 

 be the dominating factor. 



Weather and yield of potatoes {TJ. S. Dept. Agr., Nat. Weather and Crop 

 Bui. 19 {1916), pp. 2, 3. fig. 1). — A study of the effect of temperature and rain- 

 fall upon the yield of potatoes in Ohio, Michigan, and New Jersey is reported, 

 showing that the temperature of July is the most important weather factor in 

 those States. A cool July is most favorable. 



Monthly Weather Review {V. S. Mo. Weather Rev., JfJt {1916), Nos. 5, pp. 

 2Jf3-319, pis. 9, figs. 18; 6, pp. S21-379, pis. 14, figs. 28).— In addition to weather 

 forecasts, river and flood observations, and seismological reports for May and 

 June, 1916 ; lists of additions to the Weather Bureau Library and of recent 

 papers on meteorology and seismology ; notes on the weather of the months ; 

 solar and sky radiation measurements at Washington, D. C, during May and 

 June, 1916 ; condensed climatological summaries ; and the usual climatological 

 tables and charts, these numbers contain the following articles : 



No. 5. — Circumhorizontal Arc Observed, by J. T. Gray ; The Blue of the Sky 

 and Avogadro's Constant, by D. Pacini ; Photography of the Zodiacal Light and 

 Counterglow, by A. E. Douglass ; Propagation of Sound in the Atmosphere, by E. 

 van ISverdingen ; Spontaneous Ionization of the Aqueous Vapor of the Atmos- 

 phere, II, by G. Oddo ; Variation of the Emanation Content of Springs, by R. R. 

 Ramsey ; Planetary Phenomena and Solar Activity, by T. Kohl ; Free-air Data 

 by Means of Sounding Balloons, Fort Omaha, Nebr., July, 1914 (illus.), by W. R. 

 Blair; Meteorological Symbols (illus.), by C. F. Talman; The Coefficient of Cor- 

 relation as a Measure of Relationship, by C. N. Moore ; Rainfall in China, 1900- 

 1911 (illus.), by Co-Ching Chu ; American Definition of " Sleet," by C. Abbe, jr.; 

 Two Abnormal Pressure Distributions in Italy ( illus. ) , by F. Eredia ; Fog as a 

 Source of Water Supply, by W. G. Reed (see p. 619) ; A Simple Wind- Velocity 

 Indicator for Use with the Robinson Anemometer (illus.), by B. C. Kadel ; 

 Diurnal Variation of Underground Temperature, by S. Sato ; Aleksandr Ivano- 

 vich Voeikov, 1842-1916 ; The Chinese Weather Bureau, by Co-Ching Chu ; Flood 

 in the Lower Mississippi, Spring, 1916, by W. E. Barron ; and Rainfall and 

 Floods in China, by S. T. Suen. 



No. 6. — Meteor of June 28, 1916, Over Northeastern Texas (illus.), by H. H, 

 Martin; Observations of Meteor Trains; Meteor of May 7, 1916, in Ea.stern 

 Mississippi, by J. H. Jaqua ; Meteor of May 7, 1916, at Demopolis, Ala., by J. G. 

 Whitfield ; Work of the American Meteor Society, 1914 and 1915, by C. P. 

 Olivier ; Canadian Aerological Research ; Use of a Flagpole in Calibrating Kite 



