618 EXPERIMENT STATION RECORD. [Vol. 38 



loouists, and artillerists." Brief statements are made regarding the organiza- 

 tion and various activities of the division of agricultural meteorology. 



Climatological data for the United States by sections (C/. S. Dept. Agr., 

 Weather Bur. Climat. Data, 4 (1911), Nos. 9, pp. 2JfO, pis. 2, figs. 6; 10, pp. 230, 

 pis. 2, figs. //).— These volumes contain brief summaries and detailed tabular 

 statements of climatological data for each State for September and October, 

 1917, respectively. 



Meteorological summaries (Kentucky Sta. Rpt. 1915, pt. 1, pp. 73-75). — 

 Tables are given which show monthly and annual temperature and precipitation 

 at Lexington, Ky., for 1872 to 1915, inclusive, as well as temperature and pre- 

 cipitation extremes, wind, cloudine.ss, and casual phenomena for 1915. 



Meteorological obserx-ations at the Massachusetts Agricultural Experi- 

 ment Station, J. E. Ostkander, T. H. Reuman, and A. L. Chandler (Massa- 

 chusetts Sta. Met. Buls. S^7-S^S (1917), pp. 4 eaoft) .—Summaries of observa- 

 tions at Amherst, Mass., on pres^sure, temperature, humidity, precipitation, 

 wind, sunshine, cloudiness, and casual phenomena during November and De- 

 cember, 1917, are presented. The general character of the weather for 

 November is briefly discussed, and the December bulletin gives a summary for 

 the year. The principal data in this summary are as follows: 



Pressure, reduced to freezing and sea level (inches).— Maximum, 30.86, 

 December 17; minimum, 28.93, February 5; mean, 30.010. Air temperature, in 

 ground shelter (degrees F.).— Maximum, 98.5, July 31; minimum, —22.5, Decem- 

 ber 30. Humidity.— Mean dewpoint, 36.4 ; mean relative humidity, 78.1. Precipi- 

 tation. — Total rainfall or melted snow, 43.56 in. ; number of days on which 

 0.01 in. or more rain or melted snow fell, 117 ; total snowfall, 58 in. Weather.— 

 Total cloudiness recorded by sun thermometer, 1,770 hours, or 40 per cent; 

 number of clear days, 129. Bright sunshine.— N^xvahev of hours recorded, 2,684, 

 or 60 per cent. Wwc?.— Prevailing direction, west ; total movement, 44,653 

 miles; maximum daily movement, 611 miles, April 11; minimum daily move- 

 ment, 1 mile, September 20, November 30 ; maximum pressure per square foot, 

 35 lbs., April 10, northwest. Dates of frost.— Jjnf^\, May 18; first, September 

 11. Dates of snow. — Last, April 27 ; first, November 24. 



The climate of Tennessee, R. Nunn (Resources Tenn., 8 (1918), No. 1, pp. 

 7-Ji5, fixjs. 1). — This article discusses briefly the physiography and soils and 

 crops of Tennessee in their relation to climate, and summarizes in notes, tables, 

 and diagrams the outstanding climatic features (temperature, precipitation.' 

 humidity, sunshine, and cloudiness, and length of growing season) of the 

 different sections of the State. 



In general the climate of the State is said to range from mild to temperate 

 and is comparatively free from great extremes of temperature, sudden weather 

 changes, and severe storms. The rainfall is abundant but not excessive, the 

 humidity moderate, and sunshine and cloudiness well distributed through the 

 year. The ground rarely covered with snow for more than a few days at a time 

 and the crop-growing season is long as compared with that of the northern and 

 western sections of the United States. The comparatively equable climate 

 of the State is due in part to the fact that it does not lie within any of the 

 principal storm tracks. 



Climate and meteorology (Canada Yearbook, 1916-17, pp. 176-183, fig. 1).— 

 The characteristic features of the temperature, precipitation, winds, and bright 

 sunshine for the Dominion of Canada during each month of the year 1916 are 

 described, and tables are given which show the temperature and precipitation 

 during 1916 at representative stations in Canada as compared with the normal 

 annual averages for the period from 1888 to 1907, inclusive. 



