METEOROLOGY. O 



GOVERNMENT OBSERVATORY, SYDNEY. 



Latitude 33° 51' 41"; Longitude 10 1 ' 4™ 46' ; Magnetic Variation 9° 32' 45" East. 



MAY, 1875. — General Abstract. 



Barometer... Highest Reading 30*292 inches on the 25th, at 9 p.m. 



At32°Faht. Lowest Reading 29235 „ on the 12th, at 4 a.m. 



Mean Height 29 "812 



(Being 0123 inch less than that in the same month on an average of the preceding 16 years.) 



Wind G-reatest Pressure 24'5 lbs. on the 13th and 14th. 



Mean Pressure 08 lb. 



Number of Days Calm ... 



Prevailing Direction . . . W.N.W. 

 (Prevailing direction during the same month for the preceding 16 years W.) 



Temperature Highest in the Shade ... 71*1 On the 4th. 



Lowest in the Shade ... 426 On the 25th. 



G-reatest Range ... ... 19'5 On the 25th. 



Highest in the Sun . . . 108-8 On the 5th. 



Hig aia t ss T^p aCk B . 0X With } 158 " 2 0n the 4tl1 ' 

 Lowest on the Grass ... 349 On the 25th. 

 Mean Diurnal Range ... 131 

 Mean in the Shade ... 570 



(Being 1*5 less than that of the same month on an average of the preceding 16 years.) 



Humidity • . . Greatest Amount 100 On the 26th, 27th, 28th, & 29th. 



Least 46 On the 13th. 



Mean 784 



(Being 2*7 greater than that of the same month on an average of the preceding 16 years.) 



Rain ... ... Number of Days ... ... 14 rain and 4 dew. 



G-reatest Fall 3"895 inches. On the 29th. 



m . , tj, ,, ( 8 - 228 inches. 65 feet above ground. 



' ' \ 12"549 inches. 15 inches above ground 

 (Being 8*402 inches greater than that of the same month on an average of the preceding 16 years.) 



Evaporation Total Amount ... ... 1 '999 inches. 



Ozone ••• Mean Amount ... ... 52 



(Being 0-6 greater than that in the same month on an average of the preceding 15 years.) 



Electricity . • . Number of Days Lightning 7 



Cloudy Sky Mean Amount 43 



Number of Clear Days ... 8 



Meteors ... Number Observed ... 



Remarks. 



The weather during May has been very wet, the average rainfall of last 16 years 

 having been exceeded at Sydney by 8*402 inches. At Eden the rainfall for the month 

 amounted to 17'780 inches (as much as 10520 inches falling on the 4th). As in 

 last month, the heaviest rains fell on the Coast side of Main Range. Frost has now 

 shown throughout the country districts, and snow fell during the month at Armidale, 

 Murrurundi, Scone, Orange, and Mount "Victoria. There was a heavy easterly gale 

 on the 2nd, and very heavy winds on 7th, 13th, 14th, 15th, 28th, and 29th. 



