136 



ANNUAL REPORT SMITHSONIAN INSTITUTION, 1963 



Society-Smithsonian Institution Expedition to Netherlands East 

 Indies, having been secured from an animal dealer in Shanghai. 

 Seven yoimg were bom in the National Zoological Park between 1939 

 and 1945. 



Following are the statistics for the mortality rates at the National 

 Zoological Park for the past fiscal year and a table of comparison 

 with the past 7 fiscal years : 



• Reasons include preserving intact specimen for museum and research, progressed decomposition, insuf- 

 ficient remains in case of predators, etc. 



VISITORS 



Advanced planning for a National Zoological Park attendance sur- 

 vey began in August 1961 under the direction of Albert ]\Iindlin, 

 statistician of the Management Office, District of Columbia. The 

 actual collection of data commenced on July 1, 1962, and was tabu- 

 lated for the following 12 months. 



The primary purposes of the survey are to obtain objective estimates 

 of the total number of visitors during the fiscal year, the average num- 

 ber of visitors in the Park at any specific period during the year, and 

 the average length of time a visitor's automobile remains within the 

 Zoo. 



The procedure involved hand-punching IBM porto-punchcards by 

 specially trained and recruited employees on a statistically predeter- 

 mined basis at all entrances and exits of the Zoo. Sample interviews 

 of pedestrians and cars leaving at any gate were used as visitor deter- 

 mining factors. 



The hand-punched-card data thus generated were mechanically con- 

 verted into computer-adapted pmichcards and fed mto an especially 



