TWENTIETH ANNUAL YEAR BOOK— PART VIII 697 



street railway traffic stopped. The damage in Dubuque county amounted 

 to about $25,000. 



Hail was less prevalent than usual in June. The most important was 

 about 3 p. m. of the 27th, in Prussia and Summerset Townships in Adair 

 County where $100,000 damage was reported. The June hail table will ap- 

 pear in a later issue. 



The unusually prolonged hot spell, and the high humidity of the first 

 part of the warm period were exceptionally favorable for diseases of 

 small grains such as scab, red rust, smut and blight. Not much black 

 stem rust was reported. Winter wheat which had been very promising 

 since December deteriorated greatly and was prematurely ripened. Half 

 or more of the kernels in the heads became shrunken or diseased. This 

 was somewhat offset by the unusually good stand. Harvest was well ad- 

 vanced in the south and beginning in the central counties at the close of 

 the month. Spring wheat was similarly affected and oats did not fill well. 

 Corn made unusual progress and the dry weather toward the close per- 

 mitted cultivation so that the fields became fairly clean. 



Pressure. The mean pressure (reduced to sea level) for the State was 

 30.01 inches. The highest recorded was 30.30 inches at Davenport, on the 

 13th, and the lowest was 29.66 inches, at Charles City, on the 23d. The 

 monthly range was 0.^64 inch. 



Temperature. The mean temperature for the State, as shown by the 

 records of 99 stations, was 71.9°, or 2.8° higher than the normal. By 

 divisions, three tiers of counties to the division, the means were as fol- 

 lows: Northern, 70.3°, or 2.7° higher than the normal; Central, 72.1°, or 

 2.8° higher than the normal; Southern, 73.2°, or 2.9" higher than the 

 normal. The highest monthly mean was 75.8°, at Burlington and Keokuk, 

 and the lowest was 68.4° at Britt. The highest temperature reported was 

 98° at Omaha, Nebraska, on the 23d, and the lowest was 41°, at Chariton, 

 on the 4th. The temperature range for the State was 57°. 



Humidity. The average relative humidity for the State at 7 a. m. was 

 S5 per cent, and at 7 p. m. it was 68 per cent. The mean for the month 

 was 76 per cent, or 6 per cent above the normal. The highest monthly 

 mean was 82 per cent at Charles City, and the lowest was 72 per cent, at 

 Keokuk. 



Precipitation. The average precipitation for the State, as shown by 

 the records of 105 stations, was 6.13 inches, or 1.75 inches more than the 

 normal. By divisions the averages were as follows. Northern, 7.18 inches, 

 or 2.75 inches more than the normal; Central, 5.92 inches or 1.60 inches 

 more than the normal; Southern, 5.29 inches, or 0.90 of an inch more than 

 the normal. The greatest amount, 12.25 inches, occurred at Alta, and the 

 least, 1.82 inches, at Keosauqua. The greatest amount in 24 consecutive 

 hours, 5.10 inches, occurred at Sac City, on the 10th. 



Wind. The prevailing direction of the wind was from the southeast. 

 The highest velocity reported from a regular Weather Bureau station was 

 42 miles an hour, from the northwest, at Omaha, Nebraska, on the 25th. 



Sunshine and Cloudiness. The average per cent of the possible amount 

 of sunshine was 60, or about 9 per cent less than the normal. The per 



