In Australia there are three mints, Sydney, opened in 1855, Melbourne, opened in 1872, and Perth, opened in 1899.
The apparatus has been used with complete success at the Royal Observatory, Cape of Good Hope, and at Melbourne, Sydney and Cordoba.
From Cape Howe to Melbourne the fall may be taken at from 30 in.
To 40 in., Melbourne itself having an average of 25.6 in.
The difference between summer and winter is, however, less at Melbourne than at any of the places mentioned, the result of a long series of observations being spring 57°, summer 65.3°, autumn 58.7°, and winter 49-2'.