78 KANSAS CITY REVIEW OF SCIENCE. 



ance rather than dispapearance. If these gaps occur in consecutive order as to 

 time and place, pursuing when taken together, a northeastward trend, and the 

 difference in time of disappearance and reappearance at each interval accounting 

 for the passage of that interval, there can be no doubt of their forming disconnect- 

 ed parts of one and the same tornado track. The invariable accompaniment of the 

 tornado, the hailstorm, precedes the first appearance of its terrible companion 

 and succeeds its final disappearance. This characteristic should be carefully- 

 watched for and any peculiarity minutely recorded. If any one in the prosecu- 

 tion of this particular work should need a quantity of circulars, the same will be 

 mailed to them immediately, upon my receiving word as to how many of each 

 kind they desire. 



In the fulfillment of my mission I have no pet theories to advance or sup- 

 port, neither have I the time to speculate much or discuss the respective merits 

 of uncertain or untenable positions, but I am prepared for the reception of facts, 

 without measure. With regard to suggestions, I shall be a most willing recipient 

 and I trust that no one, feeling a desire in this direction will hesitate to communi- 

 cate with me at his earliest convenience. This is emphatically a public enter- 

 prise and not the effort or exclusive pride of an individual. 



It is absolutely necessary and most invaluable, when a variety of people are 

 called upon to contribute in aid of a work like this, that they should know pre- 

 cisely what information is most desired. 



With a view to cultivate familiarity respecting the character of the data re- 

 quired, I append herewith the following list of questions and remarks : Circular 

 No. I contains a list of inquiries which are to be referred in all cases to persons 

 who on the day of the storm were situated without the tornado's path, (to the N. 

 or S of it) on its immediate edge or from one to ten miles distant. In brief this 

 is a circular for outsiders only. 



Circular No. 2 contains a list of inquiries which are to be referred in all cases 

 to persons situated within the tornado's path. In brief this is a circular for in- 

 siders only. The information called for in each circular is in the main entirely- 

 distinct, but nevertheless equally important in conducting a careful analysis of 

 the phenomena of this class of violent wind storms. I urgently solicit replies, on 

 every hand and from every quarter, concerning the matter hereinafter set forth : 



CIRCULAR NO. I. — QUESTIONS AND REMARKS. 



1. How far and in what direction are you situated from the centre of the 

 path of destruction ? 



2. The time of day that the tornado cloud passed. 



3. The direction of the wind while the tornado cloud was approaching. 



4. The direction of the wind while the tornado cloud was passing. 



5. The direction of the wind after the tornado cloud passed. 



6. The direction of the wind during the fore part of the day and up to 

 the time of the first threatening appearance in the heavens. 



7. The prevailing direction of the wind at this season of the year. 



