SMITHSONIAN MISCELLANEOUS COLLECTIONS. 



190 



QUERIES RELATIYE TO TORNADOES. 



1. State the localities over which the storm extended — in the 

 new States, trace the route on the quarter-sections of the U. S. 

 Land Surveys. 



2. State the date of the occurrence of the storm, and the pre- 

 cise time of day (or height of sun) of its passing over different 

 places. 



3. State the width of the track at different places, specifying 

 how wide that portion of it was where the most violent effect 

 was produced ; and what was the nature of this effect on the 

 surface of the ground — for example, was the surface beaten 

 flat, or was it furrowed. 



4. Give the shape, color, and velocity of the storm-cloud, and 

 also the general appearance of the clouds in other parts of the 

 sky, pi'evious to, and at the immediate passage of the Tornado. 



State whether some of these clouds were of a (dull) grayish 

 color, while others were of a (bright) white color : — whether 

 these differently colored clouds were in opposite parts of the 

 sky — or whether they were in two distinct layers, one above the 

 other — what was the color of the layer (or stratum) which ivas 

 the higher — how did they appear to be moving — towards or 

 away from each other — and how did the lightning, if any, ap- 

 pear to piass from them — to each other, or to the earth. 



5. State the direction and force of the wind, before and after 

 the passage of the Tornado — and whether it blew steady or in 

 gusts. 



6. Describe the thunder and lightning observed : — whether the 

 thunder was sudden or prolonged — and the lightning, whether 

 zigzag, forked, or sheet — and what was its color. 



t. Was there accompanying rain, or hail, immediately in the 



