You can't do it automatically, but on the second slide, select your list and go
to Format > Bullets and Numbering > Numbered and set the "Start at" number to
your liking. Note that if you add an item to the list on the first slide,
you'll need to change the starting number on the second slide.
--
Sonia Coleman
Microsoft PowerPoint MVP Team
Autorun Software, Templates and Tutorials
http://www.soniacoleman.com