1136 EXPERIMENT STATION RECORD. 



monthly temperature since 1882; tridaily readings of the standard air thermometer 

 dming each month of 1904; a monthly summary of maximum, minimum, and stand- 

 ard thermometer readings; and daily readings of maximum and minimum ther- 

 mometers at 5 p. m. for each month of the year. 



Meteorological summary, C. B. Ridgaway (Wyoming Sta. Bpt. 1905, })p. 76, 77). — 

 A summary of observations at Laramie, Wyo., on temperature, atmospheric pres- 

 sure, precipitation, evaporation, and direction and velocity of the wind during the 

 year 1904. The mean temperature for the year was 41.9° F., the highest 83, July 12 

 and 15, the lowest —16, January 28; the mean barometric pressure was 23.024 in.; 

 the total precipitation was 9.58 in., the mean for the past 10 years being 9.8 in.; the 

 evaporation from May 7 to September 15 was 1.866 ft. 



The climate of Naples during the meteorological year 1903-4, E. Annibale 

 (Bol. Soc. Nat Napoli, 1. ser., 19 (1905), pp. 65-96). — Observations on atmospheric 

 pressure, temperature, humidity, precipitation, direction of the wind, cloudiness, and 

 storms are summarized and discussed. 



The rainfall regime and crops in Russia, H. Sagnier andE. Tisserand (Bui. Soc. 

 Nat. Agr. France, 66 (1906), No. 1, pp. 32-38).— Statements by A. Yermoloff regard- 

 ing the dependence of crops, particularly wheat, upon the amount and distribution 

 of spring rains, especially in central Russia, and the failure of crops in seasons of 

 deficient or badly distributed rainfall, are reported and commented upon. 



Weather forecasting (Abs. in Rev. Gen. Sri., 17 (1906), No. 8, pp. 350, 351).— A 

 report by Durand-Greville to the Belgian Astronomical Society on laws of storm 

 movements in relation to weather forecasting is briefly reviewed, and a plea is made 

 for a better system of weather forecasting in France. 



Protection of crops against hail in 1905 by means of cannon and bombs, 

 H. Dufour (Chron. Agr. Vaud, 19 (1906), No. 7, pp. 198-207).— The results of the 

 campaign of 1905 are briefly summarized and the present status and possibilities of 

 this method of protection are discussed. 



On the construction of isobaric charts for high levels in the earth's atmos- 

 phere and their dynamic significance, J. W. Saxdstrom (Trans. Amer. Phil. Soc, 

 21 (1906), No. 2, pp. 31-95, pi. 1, Jigs. 15) .—It is shown how such charts can be con- 

 structed from meteorological observations obtained by means of kites and balloons 

 in the free air, and the connection of the charts with the dynamics of the atmos- 

 phere is discussed. "It is to be expected that upon such maps we may easily and 

 naturally present our observations and experience as to atmospheric movements and, 

 therefore, it would seem to promise good results if the daily weather predictions 

 could be based upon such maps. ' ' 



The gases of the atmosphere, W. Ramsay (New York and London: The Mac- 

 millan Co., 1905, 3. ed.; rev. in Chem. News, 93 (1906), No. 2422, p. 199).— The prin- 

 cipal new feature of this edition is a chapter on radio-activity and radio-active gases. 



Water and its use for industrial and technical purposes, E. Leher (Das 

 Wasser und seine Verwendung in Industrie und Gewerbe. Leipsic: G. J. Goschen, 1905, 

 pp. 124, figs. 15). — A concise treatise on the occurrence, physical and chemical proper- 

 ties, and testing of water, the technology of water for potable purposes, steam 

 boilers, and special technical processes, water storage, and the disposal of sewage. 



The culture of anaerobic micro-organisms as applied to water analysis, 

 A. Guillemard (Ann. Inst. Past no; 20 (1906), No. 2, pp. 155-160, fig. 1).— It is 

 claimed in this article that present methods of bacteriological examination of water 

 are defective in that account is taken only of the number of organisms which develop 

 in the presence of air and that the probably equally important anaerobic organisms 

 are not taken into consideration. A method for studying the relation between 

 aerobic and anaerobic organisms in water is described, especially the apparatus and 

 method to be used in the culture of anaerobic organisms in an atmosphere of hydrogen. 



The use of copper sulphate in water filtration, H. W. Clark and S. DeM. 



