24 EXPERIMENT STATION RECORD. 



Meteorological charts of tlie Great Lakes ( U. <S'. Ikpt. Agr., WcaOier Burcmi Doc. 

 237, pp. 2o, cJiartft 14). — This is a summary for the season of 1900, and includes data 

 on opening and closing of navigation, storms and storm warnings, atmospheric pre- 

 cipitation and lake levels, fogs, ice, and wrecks and casualties. 



Meteorological observations taken in Hertfordshire in the year 1899, 

 J. HoPKiNSOX ( Truuiy. HertforcWiire Nat. Hhl. Sac, 10 {1900), No. 6, pp. 223-232) .—The 

 results of observations on temperature, humidity, rainfall, and in some cases, sun- 

 shine, at 4 stations are taliulated and discussed. 



Report on the rainfall in Hertfordshire in the year 1899, J. Hopkinson 

 {Trans. Hertfordshire Nat. Hist. Sac, 10 {1900), No. 6, pp. 213-222).— },lo\\t\-Ay records 

 of rainfall at 45 stations are tabulated and discussed. 



Meteorological observations during the year 1898-99 at the meteorological 

 observatory of the University of Naples, G. Di Paol.\ {Bui. >Sjc. Nat. Napmli, 14 

 {1900), No. 1, pp. 5-18). — Observations on temperature, pressure, elasticity and ten- 

 sion of vapor, relative humidity, direction of the wind, rainfall, and cloudiness are 

 reported. 



Meteorological observations {Mem. An. Estac. Eaol. Haro, 1900, Jul;/, p. 31). — A 

 monthly summary of observations at Haro, Spain, duringthe year ended June 30, 1900, 

 on pressure, temperature, radiation, humidity, wind movement, rainfall, evapora- 

 tion, cloudiness, storms, etc. 



Meteorological reports for 1898 and 1899 [Bot. Sta. {^Barbados'], Misc. Bid. 

 10, pp. 14-31). — This includes tabular monthly summaries of observations at Dodd's 

 Botanical Station, Barbados, on temperature, pressure, tension of vapor, humidity, 

 rainfall, rainy days, and velocity of the wind, and monthly summaries of observa- 

 tions on rainfall at a large number of places in different parts of the island. A table 

 is also given which shows the average annual rainfall, the value of the chemical 

 manures applied, the crop of the island the following year, and the number of hogs- 

 heads of sugar obtained for each inch of rain which fell the previous year for 19 years, 

 1881-1899. From this taV)le it appears that the average rainfall on the Island during 

 this period was 67.08 in., the average value of the commercial fertilizers used was 

 £57,723 (S280,533.78>, the number of hogsheads (| ton) of sugar produced per inch of 

 rain, 885. 



Psychrometric tables for obtaining vapor pressure, relative humidity, 

 and temperature of the dew-point, C. F. Marvin ( f ' ;S'. Dcpt. Agr., Weather 

 Bureau Doc. 235, pp. 84, figs. 2). — The methods and apparatus used in the measure- 

 ment of atmospheric moisture are briefly discussed, the methods of computing the 

 results are explained, and tables for the reduction of psychrometric observations at 

 stations of the Weather Bureau and cooperating observers are given. 



"Weather forecasts in Australia {Rev. Sci. Paris, 4- ser., 15 {1901), No. 10, p. 

 310). — Refers to ri'jiort of the Royal Astronomer of West Australia as claiming that 

 the night and morning forecasts have attained an accuracy of 82 to 89 per cent. 



WATER— SOILS. 



Soluble salts of cultivated soils, F. H. King and A. R. Whitson ( Wisconsin 

 Sta. Rpt. 1900, pp. 204-226, figs. 7). — This is an account of a continuation of investi- 

 gations of the i^revious year (E. S. R., 12, p. 28), including studies of the influence of 

 tillage, season, and cropping on the total amounts, relative proportions, and distri- 

 bution of nitric nitrogen and soluble salts in soils. 



"The chief effort has been devoted to a study of the amount of nitric nitrogen in 

 field soils under crop conditions throughout the season, at the same time following a 

 parallel control series of studies in jilant house cylinders as a check upon the 

 field work. 



"Work in the field was begun as soon as the frost was out of the ground and the 

 nitric nitrogen content of the 9 field plats, covering 10 acres, has been determined at 

 the middle and beginning of each month from April 18 to September 18, or 11 times. 



