charge a insulated metal sphere with a negative charge rod

[phoebus]

This is my first question in this forum. And here it is,

How do you make an insulated metal sphere has a net positive charge with a negatively charged rod?

If the rod touches the sphere, the sphere will have negative charge. If I connect sphere to ground, bring the rod near the sphere, negative charge will go to ground, then I have a positively charged sphere?

What is your answer?

Thanks.

[jtbell]

Does your textbook say anything about "charging by induction?"