96 



KANSAS ACADEMY OF SCIENCE. 



VELOCITY OF THE WIND. 



The number of miles traveled by the wind during the year was 146,039, 

 which is 9,154 miles above the annual average for the seven precedifig years* 

 This gives a mean daily velocity of 399.01 miles, and a mean hourly velocity 

 of 16,62 miles. The highest velocity was at the rate of 80 miles an hour, 

 from 3.30 to 3.49'a. m., on April 18th. The highest daily velocity was 1,121 

 miles, on March 27th and April 18th ; the highest monthly velocity was 

 16,709 miles, in April. The three windiest months were March, April and 

 May; the three calmest months were July, August and September. The 

 average hourly velocity at 7 a. m. was 15.30 miles; at 2 p.m., 18.44 miles; 

 at 9 p. M., 15.70 miles. 



BAROMETER. 



Mean height of barometer column, 29.123 inches; at 7 a.m., 29.148 inches; 

 at 2 P.M., 29.099 inches ; at 9 p. m., 29.123 inches ; maximum, 29,791 inches, 

 on November 21st; minimum, 28.303 inches, on April 18th; yearly range, 

 1.488 inches. The highest monthly mean was 29.295 inches, in November; 

 the lowest was 29.019 inches, in May. The barometer observations are coi;- 

 rected for temperature and instrumental error. 



relative humidity. 



The average atmospheric humidity for the year was 67.9; at 7 a. m., 79.2; 

 at 2 P.M., 49.9 ; at 9 p.m., 74.6. The dampest month was December — mean 

 humidity, 76.5; the driest month was April — mean humidity, 53.4. There 

 were 18 fogs, of which 9 were in January, and 4 in December. The lowest 

 humidity for any single observation was 11.8, at 2 p.m. on April 14th — less 

 than one-eighth of saturation. 



The following tables give the mean temperature, the extremes of tempera- 

 ture, the velocity of the wind, the per cent, of cloudiness, the relative hu- 

 midity, the rainfall (including melted snow), and the depth of snow, for each 

 month of the year 1880, and a comparison with the twelve preceding years: 



