NO. 7 ARGENTINE WEEKLY WEATHER FORECAST HOXMARK 23 



The final result of the temperature verification for two and a half 

 years weekly forecasting is, as will be seen in table 20, that the 

 number of weeks with positive correlation as compared with the 

 number of weeks with negative correlation is 198 per cent. 



After working some time independently with the weekly weather 

 forecast, the author found that if, as it is intended, the new method 

 of weather prognostication by solar data is going to assist or supplant 

 the primitive and established basis for weather prediction, namely, 

 the daily synoptic weather maps, it is necessary not to make use of 

 these to help the weekly forecast. Therefore the daily weather maps 

 were only consulted a few times during the year 1922 when the diffi- 

 culties were greater than usual, especially with regards to rain on 

 the first day. Later on this was discontinued, and the weather maps 

 not consulted. 



xA.t times it has been a very severe test, but the fact that the daily 

 forecast is in charge of a separate department has made it possible. 



As the present paper was intended to show only the verification 

 results for the weekly weather forecast of the " Oficina Meteoro- 

 logica Argentina," it was not thoug;ht advisable to go deeper here 

 into the most interesting point, the discussion of the connection 

 between solar radiation and the various terrestrial phenomena, especi- 

 ally of magnetism and precipitation. 



