Appendix V. 



REPORT OF THE WORK OF THE ASTROPHYSICAL OBSERVATORY FOR 

 THE YEAR ENDING JUNE 80, 1903. 



Sir: The kinds and amounts of the Observatory property are approximate!}- as 

 follows: 



Buildings $6, 300 



Apparatus 36, 900 



Library and records 6, 460 



Total 49, 660 



During the past year the acquisitions of property of the kind just enumerated have 

 been as follows: 



(a) ApjMrtdus. — Astronomical and physical apparatus has been purchased at an 

 expenditure of |3,600, the chief pieces so procured being in connection with the 

 installation of a long-focus horizontal reflecting telescope of 20 inches aperature and 

 140 feet focus. 



(b) Librnni cnid records. — The usual periodicals have been continued and additional 

 ooks of reference have been purchased, while 184 volumes of periodicals and books 



of reference have been bound. There has been expended for these several purposes 

 $460, of which sum $254.50 was chargeable to the appropriation for the fiscal year 

 ending June 30, 1902. 



No repairs of buildings worthy of note have been made during the year, but the 

 Observatory inclosure was enlarged for the better accommodation of the great hori- 

 zontal telescope by removing 39 feet at the western end of the south fence to a posi- 

 tion 20 feet to the south. 



No noteworthy losses of property have occurred. 



The Work of the Observatory. 



For convenience the work of the Observator}- will be considered under three heads, 

 as follows: 



1. Publications and miscellaneous matters. 



2. The new horizontal telescope and other apparatus. 



3. Investigations relating to the atmospheric absorption and to the solar constant 

 of radiation. 



1. PuhUcations and ndsceUaneous matters. 



Edips^e report. — A report of the expedition to Wadesboro, N. C, to observe the 



total solar eclipse of 1900 has been greatly delayed, but is now complete and in the 



hands of the printer, and it is expected will be distributed in the coming fiscal year. 



It will contain numerous plates illustrative of the work of the expedition and espe- 



• cially of the photography of the inner coronal region with the 135-foot focus lens, by 



Mr. Smillie. 



Miscellaneous work. — The Observatory staff has continued, as heretofore, to furnish 



76 



