86 



Report S.A.A. Advancement of Science. 



Argentine, 2nd April, 1906. 



Argentine, 3rd April, 1906. 



It is quite possible that cyclones north of 40° S. Lat. are broken up 

 by the Andes, but against this we have the Australian experience. To 

 answer these questions for South Africa, we require daily or semi- 

 daily barometer readings from many stations all reduced to sea level, 

 and these, except for coast stations, we have not got. But to make 

 a start, we have, at the Johannesburg Observatory, assumed empirical 

 reductions to sea-level for most of the stations in the Transvaal and 



