METEOROLOGY. 



701 



28; miiiinium mean daily, 1, — 1.5, February 24; mean maximum, 57.7, 

 59.(J; mean minimum, 3S, 30.0; mean daily range, 1G.5, 22.7; maximum 

 daily range, 35, May 12,47.5, February 17; minimum daily range, 2, 5, 

 October 25. Humidity. — Mean dew point, 40.5; mean force of vapor, 

 0.441(5; mean relative bumidity, 71.9. Frecipitation. — Total rainfall or 

 n)elted snow, 32.04 in.; number of days on wbicb 0.01 in. of rain or 

 melted snow fell, 125; total snowfall, 71^ in. Weather. — Mean clond- 

 iness observed, 50.5 per cent; total cloudiness recorded by the sun 

 thermometer, 2,488 hours, or 54.9 per cent; number of clear days, 107; 

 number of fair days, 83 ; number of cloudy days, 175. Mind. — Direction, 

 SW., 17 per cent; S., 15 per cent; IST., 15 i)er cent; NW., 13 per cent; 

 total movement, 30,257 miles.; maximum daily movement, 443 miles, 

 April 13; minimum daily movement, miles, September 29; mean daily 

 movement, 99.4; mean hourly velocity, 4.1 miles; maximum j^ressure 

 per square foot, 22i lbs. = 07 miles per hour, February 23, 2 p.m. 

 Bright sunshine. — Number of hours recorded, 2,051. Mean o^owe, 24.9 

 per cent. Bates of frost. — Last, May 22; first, August 22. Dates of 

 suoa\ — Last, April 12; first, November 5. 



Meteorological observations at Pennsylvania Station, W. 



FiiEAiiaud W. S. SwEETSEK {Pcnnsyhuoiia ISta. Kpf. ISfJo, pp. 109-173, 

 182-188, 193-322).— The meteorological work of the station in 1893 was 

 "chiefly a contii nation of the work of the preceding years, including 

 observations of the kind nsually made by the United States Weather 

 Service upon atmospheric phenomena, and also observations upon soil 

 temperatures at various depths and upon the amount of sunshine" 

 (E. S. R., 0, J). 115). Monthly summaries of observations and weekly 

 crop reports are given in the body of the report and the detailed daily 

 record in aii appendix. The annual summary is as follows: 



Sionmnrij of meteorological observations, 1893. 



Barometer (inches) : 



Mean 



Hi-liest 



Lowest 



Temperature (°r.): 



Moan *. 



Highest 



Lowest 



Annual range 



Mean dail s range 



Greatest dailj' range 



Le.ist daily range 



Jlean daily relative humidity (per cent) 



llainfiill (inches): 



'iotal 



Greatest monthly 



Greatest daily 



Xuraber of days on which 0.01 in. or more of rain fell. 



Mean percentage of cloudiness 



Number of days on which cloudiness averaged 80 per 



cent or more 



Average liours of sunshine per day 



Wind (miles) : 



Total movement 



^Maximum velocity 



Greatest daily movement 



Last frost in spring 



First frost in fall 



Tear 1893. 



29.905 



30.857 (Feb. 5) . 

 29.113 (Oct. U) 



47.6 



92 (June 20, Aug. 11) 



—7 (J an. 18) 



99 



19.1 



43 (Aug. 5, Sept. 5) 

 3 (Jan. 28, Mar. 23) , 

 78.2 



42. 2 



04.6 (May)... 

 1.6 (Aug. 29) 



135 



60.95 



152. 



32,700 



40 (Feb. 19). 

 425 (May 4) . 



Growing season (Apr. 

 to Sept., 1893). 



92 (June 20, Aug. 11). 



29 (Apr. U). 



21.1. 



43 (Aug. 5, Sept. 5). 



l.CO (Aug. 29). 



69. 



55.8. 



66. 



5 li. 56 min. 



May 8 . 



Sept. 27. 



