152 ANNUAL REPORT SMITHSONIAN INSTITUTION, 1957 



land, and Virginia cars come to the Zoo to bring guests from other 

 States. The tabulation for the fiscal year 1957 is as follows : 



Percent 



Maryland 28. 7 



Virginia 22. 9 



District of Columbia 22. 1 



Pennsylvania 4. 



New York 2.7 



North Carolina 2. 2 



New Jersey 1.6 



Ohio 1. 5 



West Virginia 1. 3 



Florida 1. 1 



94.0 



The remaining 6 percent came from other States, Canada, Alaska, 

 Newfoundland, Okinawa, France, Hawaii, Cuba, Panama, Germany, 

 Mexico, British Columbia, Nova Scotia, England, Guam, South Amer- 

 ica, Philippine Islands, and Puerto Rico. 



On the days of even small attendance there are cars parked in the 

 Zoo from at least 15 States, Territories, the District of Columbia, and 

 foreign countries. On average days there are cars from about 22 States, 

 Territories, the District of Columbia, and foreign countries-, and dur- 

 ing the periods of greatest attendance the cars represent not less than 

 34 different States, Territories, and countries. 



Parking spaces in the Zoo now accommodate 1,079 cars when the 

 bus parking place is utilized, and 969 cars when it is not used. 



GROUNDS, BUILDINGS, AND ENCLOSURES 



The National Zoological Park covers an area of 176 acres. There 

 are 3 miles of automobile roads, 3 miles of trails, 7 miles of pedestrian 

 walks, 2 miles of boundary fence, and 8 miles of paddock fence. All 

 told, there are 201 houses : 7 large exhibition buildings ; the office ; a 

 building that contains police headquarters, public restrooms, and 

 gardener's storeroom; the cafeteria; 19 service buildings, and 172 

 shelters for animals and equipment. There are 762 animal cages and 

 16 large outdoor pools. 



Also to be considered under maintenance are a central high- 

 pressure heating plant, which includes 1,800 linear feet of conduits, 

 or 3,600 feet of steam lines to the buildings, and six smaller heating 

 plants. 



During the year there were extensive replacements, remodeling, and 

 repairs to paddocks, cages, and water lines, with major repairs to the 

 roofs of 12 large animal shelters. A large outdoor pen was re- 

 modeled for the African buffalo; the mouflon yard was enlarged by 

 combining two paddocks, and the cage that had formerly housed the 



