My friend's last name is Naper.

I need to buy some new napery for the dining table.

The restaurant had beautiful naperies on the tables.

The logarithm of a number in the Naperian system is equal to the natural logarithm of the number divided by the natural logarithm of the base.

The Naperian logarithm is used to calculate exponential growth.

Naperian logarithms are used in advanced mathematics.

Naperville is a beautiful city located in DuPage County and Will County.