416 



EXPERIMENT STATION RECORD. 



Meteorological observation, 1913 (Agr. Students' Gaz., n. ser., 16 (191-i). 

 No. 6, pp. 194-199). — This ai'ticle gives siimmnries of observations ou tbe tem- 

 perature of tlie air and soil, rainfall, and sunshine at the Royal Agricultural 

 College. Cirencester, and briefly reviews the weather conditions at this place 

 and of the whole of England. 



It is stated that the year was characterized by a wet spring, a dry summer, 

 which was neither sunny nor warm, and a mild autumn, with no very wide 

 fluctuations of temperature over the whole country. The rainfall was generally 

 for the country as a whole slightly below the average. The total rainfall at the 

 college was 30.52 in., measured on 184 days. The average temperature was 

 47.6° F. The duration of bright sunshine was everywhere considerably less 

 than the average. 



Temperature records, J. B. Thompson (Guam Sta. Rpt. WIS, pp. 22-24, fiff^- 

 2). — Records of maximum and minimum temperatures at the Guam Station 

 throughout the year ended June 30. 1913, are shown in charts. 



American temperatures and European rainfall, W. J. Humphreys (Jotir. 

 Wa.'<h. Acad. Set., 4 {1914), No. 13, pp. 345-347, fig. Jf).— Data are presented to 

 show that "high annual average temperatures in America must lead to corre- 

 spondingly heavy precipitation in Europe and, conversely, that persistently low 

 average American tempei'atures must be accomjianied by more or less corre- 

 spondingly light European precipitation." 



Chemical composition of rain in the Union of South Africa, C. F. Juritz 

 (So. African Jour. ScL. 10 (1914), ^^o. 7, pp. 170-193. pi. 1; ahs. in Jour. Cliem. 

 Soc. [London], 106 (1914), No. 621, J, p. 916).— The results of determinations 

 of nitrogen and chlorin in rain water collected at different places in the Union 

 of South Africa more or less continuously from September, 1910. to December, 

 1912. are reported. The results for nitrogen are summarized in tlie following 

 table : 



Nitrogen in rain water of South Africa, in pounds per acre. 



Locality and period. 



Summer: September to 

 February. 



As am- 

 monia. 



As ni- 

 trates. 



Total. 



Winter: March to August. 



As am- 

 monia. 



As ni- 

 trates. 



Total. 



Grahamstown (Sept., 1911, to Aug., 1912) 

 Bloemfontein (Sept., 1910, to Aug., 1911). 

 Bloemfonlein (Sept., 1911, to Aug., 1912). 

 Durban (Sept., 1911, to Aug., 1912) 



Pounds. 

 0.592 

 1.425 

 3.244 

 2. 739 



Pounds. 

 0.465 



.907 

 1.077 



.780 



Pounds. 

 1.057 

 2. 332 

 4.321 

 3.519 



Pounds. 

 0.448 

 2. 233 

 1.626 

 1.796 



Pounds. 



0.264 



.713 



.286 



.295 



Pounds. 

 0.712 

 2.946 

 1.912 

 2.091 



The chlorin content varied with distance from the sea. 



Electrical hail protection, A. Angot (Ann. Soc. M6t. France, 62 (1914), 

 Mar., pp. 82-85). — The efficiency of various electrical devices which have been 

 proposed for protection against hail is briefly discussed, the general conclusion 

 being that the results have been unconvincing as to the efficiency of these 

 devices. The extension of installations for this purpose is discouraged. 



Studies in water supply, A. C. Houston (Ahs. in Cliem. News, 109 (1914), 

 No. 2834, P- 143). — This monograph is practically a summary of papers and 

 articles published by the author, embodying the results of his personal experi- 

 ences and giving accounts of his investigations. Tables of results and graph- 

 ical representations are given relating to bacteriological and chemical tests, 

 and processes of purification and sterilization are described. The question of 

 the counection between the purity of water supplies and the prevalence of 



