16 EXPERIMENT STATION EECORD. [Vol. 43 



Forecasting Miiiiiiiuni Temperatures, by G. S. Bliss; Predicting Minimum Tem- 

 I)eriitures in tlie New Orleans, La., District, by I. M. Cline; Predicting Minimum 

 Temperatures, by W. S. Belden ; Minimum Temperature Forecasting at Roswell, 

 N. Mex., by C. Hallenbeck ; Frost and Minimum Temperature Studies in the Rio 

 Grande Valley Project, U. S. Reclamation Service, by R. M. Shaver; Predicting 

 of Minimum Temperatures in Colorado, by F. H. Brandenburg; Notes on Dam- 

 age to Fruit by Low Temperatures — Prediction of Minimum Temperatures, by 

 E. S. Nichols ; Prediction of Minimum Temperatures in the Gunnison and Un- 

 compahgre Valleys in Western Colorado Based on Data Recorded at Montrose, 

 by F. W. Brist ; Forecasting Minimum Temperatures in Utah, by J. C. Alter ; 

 Predicting Mininunn Temperatures in the Walla Walla, Wash., Frost-warning 

 District, by C. C. Garrett; Forecasting Mininnim Temperatures in Oregon and 

 California, by F. D. Young; A Statistical Method for Predicting Minimum Tem- 

 peratures, by H. F. Alciatore; The Minimum Temperature, A Function of the 

 Dew Point and Humidity, at 5 p. m. of the Preceding Day — Method of Deter- 

 mining this Function by Successive Approximations to Group Averages, by G. F. 

 McEwen; and New Methods of Predicting Orchard Temperatures in the San 

 Diego Citrus District, by H. F. Alciatore. 



Forecasting frosts, B. A. Keen {Nature [London], 104 (1920), No. 2618, pp. 

 Jf.')0, /i5]). — The relative merits of dilTerent methods of temperature prediction 

 are fully discussed in this article. 



The relation between wind and evaporation, W. Gallenkamp (Met. ZtscJir. 

 [B run. sir irk], 3| (1917), No. 1, pp. 24-29, figs. 5). — An apparatus for measuring 

 this relation is described and results obtained with it are given. 



Amount and temperature of evaporation and moisture need, W^. Koppen 

 (Met. Zt.schr. [Brnnsivick], 34 (1911), No. 2, pp. 49^8, figs. 8).— Data for air 

 temperature, evaporation temperature, humidity, and amount of evaporation for 

 Mauritius; Johannesburg; Bulawayo ; Cairo; Devil's Peak Plantation, near 

 Kapstadt, Africa ; Windsor, New South Wales ; Cordova, Argentina ; and vari- 

 ous places in Russia are summarized and analyzed. A general conclusion 

 drawn is that the evaporation capacity is directly proportional to the aridity of 

 the air. It is pointed out that this is a neglected field of investigation of great 

 importance to plant production. 



Amount and temperature of evaporation and moisture need, W. Gallen- 

 kamp (Mot. Ztschr. [Brmrswick], 34 (1911), No. 10-11, pp. 349-354, figs. 8).— 

 This article describes and discusses results obtained with an apparatus devised 

 by the author for studying this question. 



Effect of afforestation on hidden condensation, P. Descombes {Rei\ Sci. 

 [I'ori.s]. .56 (1918), No. 16, pp. 490-492; ab.s. in Internatl. Inst. Agr. [Rome], 

 Intenuitl. Rcr. Sci. and Pract. Agr., 10 (1919), No. 3, pp. 258, 259).— In this 

 article the importance of afforestation in regulating the flow of water and in- 

 creasing the amount retained in the soil is emphasized. It is maintained, more- 

 over, that afforestation largely increases hidden condensation, that is, dew, 

 mist, hoar frost, and the like, which, though not registered by the rain gauge, 

 are often as important as rain. 



The action of trees in withdrawing water from the atmosphere, P. Des- 

 coMHES (Compt. Rend. Acad. Sci. [Paris], 169 (1919), No. 23, pp. 1106-1108: 

 ahs. in Rev. Sci. [Paris], 51 (1919), No. 24, pp. 154, 755).— The author reports 

 observations which indicate that trees are active agents in causing condensa- 

 tion of atmospheric moisture in other forms than as rain, and that reforest- 

 ing is an effective means of increasing and conserving the water supply. 



Meteorological summary, 1918, R. B. Hendrix (Oklahoma Sta. Rpt. 1919, 

 p. 59).— A tabular monthly and annual summary of observations at the sta- 



