208 EXPERIMENT STATION RECORD. [Vol.43 



much of it. The warm days of the fortieth parallel are followed by warm 

 nights. Within the Tropics the days are not warmer, and the nights are colder 

 than in Kansas, during midsummer — and the corn plant responds to this 

 condition." 



Manual of meteorology, IV, N. Shaw {Camhridr/e, Eng.: Univ. Press, 1919, 

 pp. XVI -{-166, pis. 4, figs. 51). — This part of this manual is based upon the re- 

 sults of a study of the relation of winds to the distribution of pressure at the 

 surface of the earth and in the free atmosphere, " setting out what amounts 

 almost to a general meterological theory." 



The study of the weather, E. H. Chapman {Cambridge, Eng.: TJniv. Press, 

 1919, lyp. XII-\-131, pis. 3, figs. 53; rev. in Sci. Prog. [Lo7i(Jon'\, IJf {1920), No. 56, 

 p. 6S3). — This book is intended primarily for use in schools, but so deals with 

 the elementary phases of the subject as to be of somewhat wider usefulness. 



Results of rainfall observations made in South Australia and the North- 

 ern Territory, H. A. Hunt et al. {McWournc: Bur. Met., 1918, pp. Jf21, i}ls. 21, 

 figs. 15). — This is the fourth of a series of reports designed to give ultimately 

 a complete review of the rainfall of all of the States of the Commonwealth of 

 Austi'alia. " It contains tabulations of all available annual totals of rainfall 

 and wet days to the year 1917 for 829 stations, as well as monthly totals to 

 1915 for about 200 of that number. ... To make the work complete for 

 reference and comparison, authentic annual (1878-1917), also average annual 

 and monthly, rainfall maps have been included, together with notes on the 

 annual variation and monthly distribution of the rainfall ; and a record of 

 notable meteorological events. Special attention has been given to the inci- 

 dence of the summer and winter rainfalls and the resultant wheat yields in 

 South Australia, and the data deduced are presented in tabular and map form. 

 Appendixes contain monthly and yearly meteorological elements and normals 

 for Adelaide and Darwin." Results of observations on rainfall and evapora- 

 tion at Adelaide, Alice Springs, and Eucla are also included, as are data on 

 floods, hailstorms, thunderstorms, windstorms, aurora australis, bush fires, 

 droughts, earthquakes, fog bows, severe frosts and exceptional cold, excessive 

 heat and heat waves, high tides, meteors, mirages, mock moon, plagues, pests, 

 and live-stock diseases, snow, volcanic dust clouds, and waterspouts and 

 cloud-bursts. 



The average annual evaporation from a water surface at Alice Springs during 

 24 years was 95.98 in., the average rainfall 10.51 in.; at Eucla (6 years) 57.72 

 in. and 9.12 in., respectively; and at Adelaide (47 years) 54.42 and 20.73 in., 

 respectively. 



Australian rainfall and wheat yield (Natnre ILntidon'], 10^ (1920), No. 

 2623, pp. 606, 607). — Commenting upon the article noted above, it is stated that 

 the data presented furnish " strong evidence of direct correlation between ^ 

 the wheat yield per acre and the rainfall of the previous winter. For South " 

 Australia and the Northern Territory the correlation coefficient works out at 

 0.61, with a pi'obable error of 0.07." ' 



Summer and winter rainfall and the wheat yield, H. A. Hunt et al. (Inj 

 Results of Rainfall Observations Made in South Australia and the Northern 

 Territory. Melbourne: Bur. Met., 1918, pp. 73-110, pi. 1). — Tables are given! 

 which show the amount of rainfall during each summer and the fol- : 

 lowing winter or agricultural season (autumn, winter, spring) and the re- 

 sultant wheat yields in the various counties in the agricultural districts of 

 South Australia, 1859-1916, The same relation is also shown graphically in 

 a map of the area. 



It is shown that in recent seasons an increasing proportion of the wheat 

 produced by South Australia has been grown outside of the line of rainfall 



