Barometric Variability at Kimberley and Elsetuhere. 107 
appears from this that readings at a given hour give a variability nearly 
always greater than that deduced from daily means. 
The observations made use of here are : — 
Hour of Years) of 
Observation.* Record. 
1. Cape Town, S. Africa VIII 13 
2. East London, S. Africa VIII 20 
3. Durban, S. Africa IX 24 
4. Kimberley, S. Africa VIII 7 ) 
Kenilworth, S. Africa VIII 16 i 
5. Daressalam, G.E. Africa VII 15 
6. Perth, Australia , IX 12 
7. Adelaide, Australia IX 30 
8. Alice Springs, Australia IX 6 
9. Port Darwin, Australia IX 6 
10. Sydney, Australia IX 16 
11. Wellington, New Zealand IX 9 
12. Staten Island, Argentina VII 8 
13. Cordoba, Argentina IX 10 
14. Hong Kong, China IX 14 
Notes on the Observations. 
1. Cape Town. The readings of the barometer and attached thermo- 
meter at the Eoyal Observatory for the 13 years 1889-1911 were kindly 
supplied by Mr. Hough. These I have reduced to 32° F. before taking out 
the variability. 
2. East London. The readings of the barometer and attached 
thermometer at the Port Office for the 20 years 1885-1904, less half a 
month in January, 1885, were kindly supplied by the Harbour Board. 
These I have reduced to 32° F. before taking out the variability. The 
observations made in the first half of November, 1893, have had to be 
rejected as obviously erroneous. 
3. Durban. The variability at the Natal Observatory has been com- 
puted from the pressures (at 32° F. and sea-level) published in the 
excellent Reports of the Natal Government Astronomer for the 24 years 
1885-1908. 
Meteorologically speaking, the Durban Observatory has been one of 
the bright spots in South Africa. Perhaps that is why it has been closed, 
and its fine series of observations brought to an end. 
4. Kimberley. Barometric observations were made twice a day 
* The Hour of Observation is approximate in some cases ; also the record is not 
in every case unbroken 
