SECRETARY'S REPORT 169 



between the bears and the hardy cats. To insuie that the police offi- 

 cers doing the interviewing were completely unable to affect, either 

 intentionally or unintentionally, the random sampling of the visitors, 

 a chalk line was drawn on the sidewalk and the interviewer given a 

 mechanical hand counter. It was specified that he should interview 

 eveiy tenth person coming down the hill, with the exception of babes 

 in arms. During those portions of the year when visitor attendance 

 was very light, every fifth person was interviewed. 



To insure random sampling, one Sunday was selected at random 

 from all the Sundays of the month, one Saturday at random from 

 the Saturdays, and two weekdays at random from the available week- 

 days. The day selected was divided into four 2-hour periods ; in each 

 period 1 houi* was selected at random. The police officer to make 

 the interviews was randomly selected from those available on the 

 day of the sampling. The police officer asked each interviewee a 

 single question : "Where do you live ?" 



The information gathered from the visitor survey was then reduced 

 to mathematical formulae by the research statistician of the District 

 of Columbia, and the following cmnulative percentages were arrived 

 at: District of Columbia residents, 18.8; nonresidents, 81.2 (sub- 

 urban, 30 ; otlier, 51.2) . 



POLICE DEPARTMENT 



Activities in the police department showed a marked increase in 

 keeping with the larger visitor attendance. A new cruiser was placed 

 in service and traveled a distance of 24,000 miles in the year. This 

 made possible more rigid traffic-law enforcement and resulted in an 

 increase in the number of arrests for traffic violations. 



Sgt. D. B. Bell and Sgt. E. A. King attended and graduated from 

 the Metropolitan Police Academy in March. 



Lt. C. E. Brink, Sgt. E. A. King, Pvts. M. J. Devlin, H. J. Moore, 

 and D. E. Trautman attended the monthly sessions of the Law En- 

 forcement Institute at the University of Maryland and received 

 certificates in June. 



Sgt. A. L. Canter and Pvt. G. PI. Adams attended a special course 

 in the driver training program held by the Bureau of Departmental 

 Operations, U.S. Civil Service Commission. 



The mounted color guard consisting of five men, with Sgt. D. B. 

 Bell in charge, participated in several parades. 



The old switchboard at police headquarters was taken out of service 

 at the administration building, and a new modern telephone system 

 was put in operation early in November. 



A new target range was completed, giving all members of the 

 department the opportunity to practice and qualify for better marks- 

 manship. Work on it was done by volunteer members of the force. 



