170 



KANSAS CITY J? E VIEW OF SCIENCE. 



29th. Miles traveled by wind, 10,184. Highest velocity of wind, 41 on the 20th. 

 The usual summary by decades is given below : 



TEMPERATURE OF THE AIR. 



MiN. AND Max. Averages. 



Min 



Max 



Min. and Max 



Range 



Tri-Daily Observations. 



7 a. m 



2 p. m 



9 P- m 



Mean 



Relative Humidity. 



7. a. m. . . . ... 



2 p. m 



9 P- m 



Mean 



Pressure as Observed. 



7 a. m 



2 p. m 



9 P' m 



Mean 



Miles per Hour of Wind. 



7 a. m 



2 p. m 



9 P- m. 



Total miles 



Clouding by Tenths. 



7 a. m 



2 p. m 



9 P- m 



Rain. 



Inches 



May 20th 

 to 31st. 



60.3 



79-3 

 69.8 

 19.0 



66.0 

 76.0 

 67.4 

 69.2 



.81 

 •74 

 .87 



28,92 

 28.90 



28.88 

 28.90 



9.0 

 14. 1 



lO.O 



2,530 



7.0 

 9.1 

 2.2 



.85 



June 1st 

 to 10th. 



62.7 



86.8 



74 7 

 24.1 



69.4 

 83.2 

 70.6 

 73-2 



■85 

 •65 



•85 

 .78 



28.85 

 28.84 

 28.85 

 28.85 



10.5 



19-3 

 12. 1 



3,987 



3-5 

 3-0 

 3-5 



June loth 

 to 20th. 



67.0 

 89.6 



783 

 22.6 



74-3 

 87.3 

 76.7 



79-9 



.80 

 .64 

 .81 

 •75 



28.89 

 28.86 

 28.87 

 28.87 



13.2 

 21.3 

 12.2 

 3,367 



4^5 

 2^3 

 2.1 



1. 12 



Mean. 



63-3 



85.2 



743 

 21.9 



69.9 

 82.2 

 71.6 

 74.1 



.82 

 .67 

 .84 

 •79 



28.89 

 28.87 

 28.87 

 28.87 



10.9 

 18.2 

 11.4 

 10,184 



5.0 

 4.8 

 2.6 



4.09 



THE PRESSURE OF WIND. 



In a paper before the American Society of Civil Engineers, Mr. C. Shaler 

 Smith gives the results of many years' observations of wind pressure and its effects- 

 He has personally visited the tracks of destructive storms as soon as possible after 

 their occurrence, for the purpose of determining the maximum force and the 

 width of the path of the storm in every instance. The most violent storm in Mr. 

 Smith's records was at East St. Louis, in 1871, when the wind overturned a lo- 

 comotive, the maximum force developed in so doing being no less than 93 lb. per 

 square foot. At St. Charles, in 1877, a jail was destroyed, the wind force re- 

 quired being 84.3 lb. per square foot. At Marshfield (Mo.), in 1880, a brick 

 mansion was leveled, the force required being 58 lb, per square foot. Below 

 these extraordinary pressures there were sundry cases of trains blown off rails, and 

 bridges, etc., blown down by gales of wind of from 24 lb. to 31 lb. per square 

 foot. Mr. Smith observes that in all his examples he has taken the minimum 



