1.   A promise was given to double the number of police on duty.

2.   As to the enforcement of lorry weights, we have doubled the number of inspections over the past five years.

3.   Can you double the number of homes on a plot of land without making the residents claustrophobic or the neighbors ballistic?

4.   In one facetious article he promised to show the government how to double the number of jobs in the railroad industry.

5.   Of course, if you drink two glasses, double the number of units shown.

6.   Summers and Clark also discovered that unemployment insurance roughly doubles the number of people who stay unemployed for more than three months.

7.   The way to outvote them was to double the number of people who held to the old ways.

8.   This roughly doubled the number of known and treated hypertensives in the practice.