Meteorologica I O hserva t io n s . 



149 



which the wind goes back to its old N.W. quarter, and the 

 weather becomes settled. 



A north-east wind, if it continues to blow for a few hours, 

 invariably brings rain. Thunder and lightning are not 

 frequent, but occur occasionally after a hot wind, with the 

 usual heavy rain attendant upon thunder-storms. They 

 always approach from the leeward. 



Perhaps one of the most remarkable states of the atmo- 

 spheric pressure occurred in the month of July. At 1 p.m., 

 on the 23rd of that month, the Barometer stood at 28'°-510, 

 the lowest registered at the Observatory since its establish- 

 ment in ] 840 ; the weather at the same time being beautifully 

 clear and fine, and remaining so for some days. Accounts 

 received afterwards from the neighbouring Colonies showed 

 that floods of rain had occurred at that time ; and on the 

 northern side of this Island a large quantity fell also : but 

 there was none in the neighbourhood of Hobart Town. 



1848. 

 Atmospheric Pressure and Temi^erature for the Year. 



1848. 



Barometer during the 

 Month. 



Fah. Thermometer 

 during the Month. 



Mean for the whole 

 Month. 



Max. 



Min. 



Max. 



Min. 



Barometer. 



Therm. 





Inch. 



30-166 

 30-276 

 30-212 

 30-373 

 30-184 

 30-402 

 30 370 

 30-297 

 30-242 

 30-226 

 29-938 

 30-110 



Inch. 



28-952 

 29-477 

 29-218 

 29-173 

 29-180 

 29-392 

 29-407 

 28-760 

 28-596 

 29-051 

 28-938 

 28-869 



82-7 

 81-0 

 81-0 

 77-2 

 67-0 

 59-0 

 54-3 

 67-8 

 72-0 

 72-0 

 74-7 

 86-6 



43-0 

 42-7 

 47-3 

 39-6 

 34-2 

 34-7 

 31-3 

 35-3 

 36-2 

 39-0 

 40-0 

 39-8 



Inch . 



29-737 

 29-950 

 29-743 

 29-790 

 29-740 

 29-941 

 30-004 

 29-722 

 29-549 

 29-698 

 29-442 

 29-550 



60-2 

 59-3 

 59-6 

 66-9 

 49-1 

 45-8 

 42-8 

 45-3 

 48-6 

 50-4 

 53 3 

 56-7 



February 



March 



April 



Mav €.... 



June ....• 



July 



Aucust 



September 



October 



November 



December 



Durinp^ the Yeai 



30-402 



28-596 



86-° 6 



31-3 



29-739 



52-° 3 



The mean pressure and temperature for the whole month 

 are deduced from hourly observations, day and night (except 



