PROCEEDINGS OF THE REGENTS. 129 



promise of much advance in the measurement of rays such as the 

 earth sends out into space at all times, which as a whole balance in 

 their energy the energy of the sun's rays by which the temperature 

 of the earth's surface is maintained. 



Through the interest and generosity of Mr. John A. Roebling, of 

 New Jersey, who gave the institution $11,000 for this purpose, and 

 through the energy displayed by the several observers concerned, 

 the solar radiation observing station of the institution, located near 

 the city of Calama, Chile, was removed to a much more favorable 

 site on a mountain called "Montezuma," about 10 miles farther 

 south, which is between 9,000 and 10,000 feet above sea level. 



Details of this work will appear in later reports. 



NATIONAL ZOOLOGICAL PARK. 



Recent accessions.— Several valuable collections of animals have 

 reached the park in recent weeks. A young male orang-utan, about 

 3 years old, together with other animals from that region, was pre- 

 sented by Mr. Isaac Ellison, of Singapore, Straits Settlements. 



Mr. Victor J. Evans, of Washington, D. C, who has frequently 

 shown his great interest by obtaining for the park rare animals 

 otherwise beyond the limits of park funds, has recently purchased 

 for the collection a fine young male Kadiak bear and a pair of beau- 

 tiful Count Raggi's birds of paradise. 



Attendance.— The attendance at the park continues to increase 

 month by month. Although the fiscal year ending June 30, 1920, 

 in the number of visitors, over 2,250,000, exceeded all records, the 

 figures for the first four months of the current year, exceed those for 

 corresponding months of 1919 by over 67,000. The monthly record 

 for the first third of the current fiscal year is as follows: July, 

 172,500; August, 211,600; September, 190,900; October, 323,150. 



EXPEDITIONS. 



Smithsonian African expedition, — Thus far about 100 birds and 

 100 mammals have arrived, and notice of three additional shipments 

 has been received. The collection contains three chimpanzees, be- 

 sides a large number of species from South Africa, a region hitherto 

 poorly represented in our museum. 



Australian expedition. — Dr. William L. Abbott's generosity toward 

 the institution has been continued, and an expedition to Australia 

 financed by him is at present collecting biological specimens for the 

 museum, while Doctor Abbott himself collected natural history and 

 anthropological material in Haiti. Since July, 1919, he has provided 

 $6,000 for collecting in Australia, together with the unused balance 

 from his previous expedition to Borneo and Celebes, which was trans- 



