152 



S. A. Hill — Tornadoes and Haihtorms of Ap-il [No. 2, 



to diminish upwards, at the following rates, wliicli liavo been determined 

 from observations in the day time in the month of May in North- Western 

 India, and are given at p. 358 of a paper on the Winds of Northern 

 India, published in the Phil. Trans., Vol. 178. 



Height. Temperature Decrement. 



Sea-level to 1,000 ft. 



7-3° 



1,000 



to 2,000 „ 



61 



2,000 



to 3,000 „ 



51 



3,000 



to 4,000 „ 



4-1 



4,000 



to 5,000 „ 



3-2 



5,000 



to 6,000 „ 



2-3 



6,000 



to 7,000 „ 



1-5 



7,000 



to 8,000 „ 



0-8 



Some of the barometric observations appear to be in error to the 

 extent of a tenth or a twentieth of an inch. These are marked with 

 a note of interrogation. 



