10 METEOEOLOOY. 



GOVERNMENT OBSERVATORY, SYDNEY. 



Latitude 33° 51' 41"; Longitude 10'' i m 46 s ; Magnetic Variation 9° 32' 45" East. 



OCTOBER, 1875.— General Abstract. 



Barometer ... Highest Reading ... ... 30 - 128 inches on the 6th, at 9 a.m. 



. QOO ^ , Lowest Reading ... ... 29282 „ on the 31st, at 4T7 p.m. 



AtdZ nant. MeanHeighfc 29732 



(Being 0116 inch less than that in the same month on an average of the preceding 16 years.) 



Wind ••• Greatest Pressure ... 13*5 lbs. on the 21st. 



Mean Pressure 08 1b. 



Number of Days Calm ... 



Prevailing Direction ... S. 

 (Prevailing direction during the same month for the preceding 16 years, N.E.) 



Temperature Highest in the Shade . . . 84'9 On the 15th. 



Lowest in the Shade ... 50*3 On the 22nd. 



Greatest Range ... ... 28*9 On the 1st. 



Highest in the Sun ... 125-2 On the 14th. 



Highestin Black Box with) 100 „ ,-* ,, - ., 



Glass Top ... j 1830 °n the 18th. 



Lowest on the Grass ... 424 On the 4th. 

 Mean Diurnal Range ... 15*4 

 Mean in the Shade ... 64*5 

 Being 1*0 greater than that of the same month on an average of the preceding 16 years.) 



Humidity... Greatest Amount 92-0 On the 2nd, 20th, and 25th. 



Least 31-0 On the 1st. 



Mean 68'8 



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



Rain... ... Number of Days 11 rain and 1 dew. 



Greatest Eall 0-404 inch. On the 10th. 



m + i -to -11 f 0'500 inch. 65 feet above ground. 



• L0talJJaii I 1055 inch. 15 inches above ground. 



(Be ing 1-562 inch less than that of the same month on an average of the preceding 16 years.) 

 Evaporation Total Amount ... ... 6 - 489 inches. 



Ozone ••• Mean Amount 60 



(Being 0'8 greater than that in the same month on an average of thepreceding 15 years.) 

 Electricity. • • Number of Days Lightning 7 



Cloudy Sky Mean Amount 6 3 



Number of Clear Days ... 1 



Meteors • • • Number Observed ... 4 



Bemarks. 



The weather during the month was hot and dry, with low barometer, and less 

 than half the average rainfall. Brilliant meteors were seen on the 5th and 26th. 



In the country there was generally a moderate rainfall, and at some of the 

 Southern Stations it was abundant. Snow was seen on the mountains near Scone, 

 and near Orange, on the 21st. 



