Sept. 1849. 



ACCIDENT TO INSTRUMENTS. 



139 



Another time 1 aseendecj a third spur from this great 

 mountain, and was overtaken by a heavy gale and thunder- 

 storm, the latter is a rare phenomenon : it blew clown my 

 tripod and instruments which I had thought securely 



SUMMIT OF FORKED DONKIA, AND " GOA " ANTELOPES. 



propped with stones, and the thermometers were broken, 

 but fortunately not the barometer. On picking up the 

 latter, which lay with its top down the hill, a large bubble 

 of air appeared, which I passed up and down the tube, 

 and then allowed to escape ; when I heard a rattling of 

 broken glass in the cistern. Having another barometer * 



This barometer (one of Newman's portable instruments) I have now at Kew : 

 it was compared with the Royal Society's standard before leaving England ; and 

 varied according to comparisons made with the Calcutta standard 0'012 during 

 its travels ; on leaving Calcutta its error was 0; and on arriving in England, by 



