72 REPORT OF THE SECRETARY. 



CENTRAL HEATING PLANT. 



The central heating plant which had been installed during the previous year 

 was operated throughout the winter of 1906-7 and five of the more important 

 buildings were heated from it. Steam is used for the present, as there was not 

 a sufficient amount available for the plant to put in a hot-water system with 

 forced circulation. All mains, however, are of suitable size for hot water and 

 it is expected that it will ultimately be converted into a hot-water system. It 

 has worked very satisfactorily and there has been practically no loss of heat 

 from the outdoor conduits. The buildings formerly heated by individual boilers, 

 and now supplied from the central heating plant, are free from dirt and dust, 

 and the new arrangement is in every way a great improvement. Thanks are 

 due to the Supervising Architect for advice and assistance and for detailing 

 an expert heating engineer to plan and supervise this work. 



SURVEY OF THE PABK. 



The detailed topographic survey of the park, which was carried on in 1904-5 

 and 1905-6, was finally completed during this year, about 107£ acres being care- 

 fully plotted. This survey extends to the line of the new highways on the 

 southeastern and western sides of the park. The resulting map is on a scale 

 of 50 feet to the inch and shows contours at elevations of 2 feet, also all promi- 

 nent objects and the underground drains and water pipes. 



ACCESSIONS AND LOSSES. 



Gifts. — The following animals were received by gift: 



From E. H. Plumacher, United States consul, Maracaibo, Venezuela, 1 capy- 

 bara, 1 crab-eating dog, 1 king vulture, 1 macaw. 



From C. II. Jones, Campeche, Mexico, 2 ocelots, 6 Mexican curassows, 1 Chap- 

 man's curassow, 3 chachalacas. 



From O. J. Field, chief clerk, Department of Justice, 1 cinnamon bear. 



From Victor J. Evans, Washington, District of Columbia, 2 mangabey monkeys. 



From Mrs. Geo. R. Shanton, Ancon, Canal Zone, Panama, 2 Panama curassows. 



Exchanges. — The more important animals secured in this manner during the 

 year were : One leucoryx, from the New York Zoological Park ; 2 American 

 marten ; 1 victoria crowned pigeon. 



Purchases. — Among the purchases were the following : Two American bison, 

 2 South American jaguars, 1 Mexican jaguar, 1 tigress, 1 black leopard, 1 pair 

 of ocellated turkeys, 1 pair of California sea lions. 



Births. — Among the births were: Two American bison, 6 American elk, 3 

 mule deer, 1 Barasingha deer, 2 red deer, 1 Cuban deer, 3 Barbary sheep, 1 

 llama, 3 peccaries, and 11 wild turkeys, besides a number, of species of heron, 

 ibis, cormorant, etc., nested in the flying cage. 



Important deaths. — The more important deaths were as follows : 



Young lion presented to the President by the King of Abyssinia, from chronic 

 arthritis. 



Black bear, from an extreme case of infestation with Ascaris transfugae ; the 

 duodenum was perforated in several places. 



Bactrian camel, female, from peritonitis and secondary pneumonia. 



Llama, male, from pneumonia. 



Moose, from catarrhal enteritis and fatty degeneration of liver. 



Great srray kangaroo, from pulmonary tuberculosis. 



