192 ANNUAL REPORT SMITHSONIAN INSTITUTION, 1959 
Name Principal interest 
Walch, Miss Carolyn R., Wildlife observation. 
Johns Hopkins University. 
Ward, Mr. and Mrs. R., Bird photography. 
Kennett Square, Pa. 
Weil, Mr. and Mrs. John, Wildlife observation. 
University of California, Berkeley. 
Wetmore, Dr. and Mrs. Alexander, Bird observation. 
Washington, D.C. 
Wyse, Gordon B., Wildlife observation. 
Swarthmore College. 
VISITORS 
Approximately 400 visitors were permitted to visit the island for 
the day. 
Because of the increased number of scientists conducting research 
on the island, the decision was made to eliminate the Tuesday guided 
tours through the jungle. Large groups are welcome on Saturdays, 
however, and visitors interested in natural history are permitted to 
visit the island whenever transportation is available. 
RAINFALL 
During the dry season (January through April) of the calendar 
year 1958, rains of 0.01 inch or more fell during 57 days (216 hours) 
and amounted to 19.31 inches, as compared to 1.20 inches during 
1957. During the wet season of 1958 (May through December), 
rains of 0.01 inch or more fell on 191 days (669 hours) and amounted 
to 80.89 inches, as compared to 96.77 inches during 1957. Total 
rainfall for the year was 100.20 inches. During 34 years of record, 
the wettest year was 1935 with 143.42 inches, and the driest year was 
1930, with only 76.57 inches. March was the driest month of 1958 
(2.98 inches) and October the wettest (15.42 inches). The maximum 
records for short periods were: 5 minutes: 1.30 inches; 10 minutes: 
1.65 inches; 1 hour: 4.11 inches; 2 hours: 4.81 inches; 24 hours: 10.48 
inches. 
BUILDINGS, EQUIPMENT, AND IMPROVEMENTS 
Special attention has again been paid to the improvement of existing 
facilities. 
The expansion of the library has continued. A great many new 
books and journals were received, and most of the older books and 
journals were re-bound. A temporary librarian completed the cata- 
loging of the collection. The library is now much more useful as 
an aid to research than it has ever been before. 
Many new aviaries, mammal pens, and smaller cages were built 
this year. Facilities are now available for the keeping of considerable 
numbers of animals and birds in excellent condition for experimental 
observations, 
