lO SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 89 



altitude, being, in fact, the sole remnants of an extensive high plateau, 

 the remainder of which has been cut down by erosion. We carried on 

 our observations on the easterly and smaller of the two peaks, the 

 westerly one being nearly 2 miles square. That very heavy rains occur 

 at times was shown by the fact that a cloudburst had, a few months 

 before, caused Mr. Bassingthwaighte's reservoir to overflow, carrying 



LOG /^sc 



3 8 13 18 23 



LOG PYRHELIOMETER SOLAR CALORIES 



Fig. S. 



(Note. — Erongo sky calories measured before changing vestibule; Grosskopf 

 after changing it.) 



away the dam. He was repairing the break when we were there, and 

 he very generously allowed us to use his native boys to carry our 

 equipment up the mountain. He used three scrapers drawn by 12 

 oxen each, while repairing his dam, and the boys packed up our out- 

 fit on a day while the oxen were resting. Mr. and Mrs. Bassing- 

 thwaighte were most hospitable to us, and he even accompanied the 

 natives up the mountain each time to superintend the packing. He 

 spoke Hottentot with all its peculiar clicks, just as well as the natives. 



