KANSAS ACADEMY OF SCIENCE. 



25 



were May, July and August. The average velocity at 7 a. m , was 14.48 

 miles; at 2 p. m., 17.51 miles; at 9 p. m., 15 46 miles, 



BAROMETER. 



Mean height of barometer column, 29.103 inches; at 7 A M., 29.125 

 inches ; at 2 p. M., 29.081 inches ; at 9 p. M., 29.104 inches. Maximum, 29.722 

 inches, on January 26th; minimum, 28.305 inches, on March 11th; yearly 

 range, 1.417 inches. The highest monthly mean was 29.255 inches, in Jan- 

 uary; the lowest was 28 769 inches, in June. The barometer observations 

 are corrected for temperature and instrumental error. 



RELATIVE HUMIDITY. 



The average atmospheric humidity for the year was 70.12; at 7 A. M., 

 80.14; at 2 p. m., 53.36;. at 9 p. m., 76 88. The dampest month was Febru- 

 ary, with mean humidity 79 8; the driest month was September, with mean 

 humidity 60.76. There were eleven fogs during the year. The least hu- 

 midity for any single observation was 16.1, at 2 p. M. on the 24th of Septem- 

 ber — less than one-sixth of saturation. 



The following table gives the mean temperature, the extremes of tempera- 

 ture, the velocity of the wind, the percentage of cloudiness, the relative hu- 

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

 month of the year 1881. 



January 21.60 



February 25.78 



March ' 37.47 



Mean 

 temper- 

 ature. 



April 



May 



June 



July 



August 



September.. 



October 



November.. 

 December.. 



Mean 54.65 



52.47 

 69.86 

 77.25 

 79.74 

 81.2.3 

 7(1.59 

 59.27 

 40.40 

 40.10 



Max. 

 temper- 

 ature. 



53.0 

 61.5 

 77.0 

 84.0 

 88.5 

 97.0 

 102.0 

 104.0 

 99.0 

 91.0 

 71.5 

 63.0 



82.6 



Min. 

 temper- 

 ature. 



*-8.0 

 -5.5 

 14.0 

 13.0 

 48.0 

 62.5 

 57.5 

 62.0 

 42.5 

 39.5 

 11.0 

 18.0 



Miles 

 of wind. 



12,192 

 12,142 

 16,231 

 14,495 

 8,868 

 11,474 

 7,541 

 7,991 

 11,722 

 12,189 

 13,906 

 12,679 



31.1 11,786 70.12 2.77 



Relative 

 humidity. 



75.90 

 79.80 

 70.30 

 67.60 

 72.47 

 70.10 

 72.50 

 62.50 

 60.76 

 74.25 

 66.99 

 68.30 



Rain, 

 inches. 



0.34 

 4.60 

 1.66 

 1.27 

 3.51 

 4.. 52 

 2.28 

 1.57 

 5.72 

 4.35 

 2.55 

 0.90 



Snow, 

 inches. 



0.5 



22.0 



8.0 



1.0 

 1.0 



2.7 



Mean 

 cloudi- 

 ness. 



58.60 

 54.17 

 45.79 

 51.78 

 64.08 

 81.89 

 26.23 

 31.29 

 43.89 

 61.72 

 45.55 

 55.26 



47.52 



*The minus sign denotes temperature below zero. 



NOTES ON KANSAS MINERALS. 



BY ERASMUS HAWORTH, EMPIRE CITY, KANSAS. 



The following minerals, neiv to Kansas, have been found in Cherokee county : 

 1. Native sulphur. 2. Chalcopyrite (copper pyrites). 3. Greenockite 

 (cadmium sulphide). 4. Anglesite (lead sulphate). 



1. Native sulphur occurs at Weir City, and in other coal-mining districts. 

 The "dumps" at the coal shafts take fire spontaneously, and the heat decom- 

 poses a portion of the iron pyrites, the sulphur from which is votilized, and 



