NO. 4 



SITE FOR SOLAR-RADIATION STATION MOORE 



annual rainfall, seemed to be enshrouded in cirrus even more than the 

 Erongos. On many days the intense haziness intervening- entirely 

 hid Brandberg from view^. 



We had originally planned to visit this high mountain after com- 

 pleting our observations on Erongo Mountain, but the record of 

 cloudiness made this seem useless, so after communicating with Wash- 

 ington by cable, we turned south to investigate Ganzberg Mountain, 



4 9 14 19 24 



LOG PYRHELIOMETER SOLAR CALORIES 

 Fig. 4. 



(Note.— June 24, sky calories measured before changing sky vestibule; Septem- 

 ber 20, after changing.) 



west of Rehoboth. This mountain lies at latitude 23° 19' S. and longi- 

 tude 16° 15' E., on the Gruendoorn farm owned by Otto Bassing- 

 thwaighte, and is about 7,600 feet in elevation. It is situated on the 

 border between the nearly rainless Namib and an area in the Rehoboth 

 section, which in some years has a rainfall as high as 16 inches. The 

 mountain has the advantage of comparative accessibility, since its base, 

 which can be reached by automobile, lies at nearly 6,000 feet elevation. 

 Ganzberg consists of two separate flat-topped mountains of equal 



