164 



S. A. Uin — Tornaihes and nailstorms of April [No. 2, 



cloud layer where these began to be retarded on approaching the low- 

 pressure axis, and they were carried forward with the current in which 

 they originated. Regarding the vertical movements and the produc- 

 tion of hail, of the origin of which Terrel's theory appeal's to me to 

 be the true one, it is impossible for want of information to enter into 

 any detail. The form of the storm-cloud, so indicative of vertical suc- 

 tion as well as of horizontal whirling movements, and to which so much 

 attention lias been paid iu America, is not even mentioned in any of the 

 local reports. 



APPENDIX I. 



Circular Letter op Inquiry and Replies trom District OrncEEs. 

 Circular, 



Having been charged by the Meteorological Reporter to the Govern- 

 ment of India with the preparation of an account of the origin and history 

 of the destructive storm which recently visited Moradabad, I have the 

 honour to request the favour of your assistance in furnishing materials 

 for discussion regarding the storm .in so far as it affected your district. 



From the reports received from your HJisik and thanas I have to re- 

 quest in particular that you will be good enough to furnish me with an 

 abstract of the information on the following points : 



1. The date and hour at which the storm commenced in those 

 places where it was felt, and its duration at each place 



2. The direction of the wind at each place at the beginning, 

 middle and end of the storm. 



3. An estimate of the force of the wind from observation of the 

 damage done by uprooting trees, unroofing houses, &o. 



4. Whether the storm was accompanied by hail or not, and if 

 hail was observed, what was the average size of the hailstones ? 



5. How many people wore killed, if any, and how they were killed, 

 whether by lightning, falling in of houses, or from what cause ? 



6. What was the estimated value of the total damage done by 

 the storm ? 



As the path of the storm seems to have avoided the regular 

 meteorological observations, I shall bo glad if you happen to be able to 

 furnish any harometric or thermometric observations made during its 

 passage. 



