TORNADO STUDIES FOR 1882. ' 85 



hour of observation, for two days before, the day of the storm, and for two days 

 thereafter, viz : on the 



59. When the time of day is asked, give the same in hours and minutes, 

 and state whether it is local or railroad time, and by what standard, viz : Chicago, 

 Detroit, Columbus, St. Louis, etc., etc. 



60. If possible, try to represent the tornado cloud by a rough sketch, as 

 also the dark and irregular clouds surrounding it. 



61. In describing the path of destruction, be careful to note where the 

 tornado cloud left the ground, where it again descended, the length of the interval 

 and the topography of the earth at the points of ascension and descension. Also 

 state whether the hail and rain continued to fall after the tornado cloud rose from 

 the earth and disappeared in the overhanging clouds. 



62. Send any newspaper article concerning the storm which you may have, 

 or can obtain without inconvenience. 



63. Give name and address of any one in your State who is in the habit of 

 keeping a meteorological record or who desires to keep one and would like in- 

 structions. 



64. If possible, try and secure the cooperation of some intelligent person, 

 who, at the time of its occurence, was situated either in the path of the tornado 

 or on the outer edge of it, and who will be willing to furnish me a narrative of the 

 result of his observations. 



65. In all descriptions of the tornado's path; in giving any particular de- 

 struction in it, or in detaiHngyour experience while the tornado cloud was passing, 

 be careful to state on which side of the centre (to the N. or S. and how far) the 

 damage occurred or you were situated while a witness of the scene. 



66. Give an estimate of what you consider the progressive velocity of the 

 tornado cloud ; how many miles per hour. Give the data upon which you make 

 the estimate, and why you believe your estimate to be reliable. 



67. What evidence can you give of the existence of upward and whirling 

 currents of air within the central portion of the tornado cloud? 



68. Estimate the time in minutes or seconds during which the tornado 

 cloud was committing the destruction at your buildings or in passing them at a 

 safe distance. 



69. As the tornado cloud approached from what direction came the wind 

 you first experienced, whether against your body or against the building within 

 which you were situated at the time ? 



70. Did you notice any peculiar odor in the atmosphere during the passage 

 of the tornado cloud, and what was it like ? 



71. Do you know of any one who made observations on the presence of 

 ozone in the atmosphere on the day of the storm? If so, send me his address 

 or give the result of the observations. 



72. Do you know of any one who made observations with the galvanometer 

 or compass concerning the deflection of the needle during the day of the storm, 



