This means a consumption of 30W so it is safe to supply it with an adapter capable of supplying 90W (piece of cake for the bigger adapter).
Just check if the plug fits and if the polarity is the same. Usually + is in the middle of the plug. Look on the adapter and on the netbook for a small sketch depicting the plug viewed from the front where it says where + is. It may look like a small circle with a dot in the midle and a line from the dot that points toward a polarity sign (usually a + )

I get it......I just made a suggestion is all.

Stupid me. I even took electrical classes. What I said above applies to higher voltages. At 19V, yes you're right.

I might as well make a basic example for everyone. 19V with 19 ohm resistance = 1A. Jack it up to 50V with the same resistance and you draw 2.63A which is more than it was designed for.

You get one insult reply about my deteriorating knowledge.

Yeah, you suggested I play Russian roulette with my netbook.

Did you check behind the couch?

No. I just found out my pet space hamster ate it.

:))
You get away with it this time. I don't expect everyone to know these things.

My bunny ate my adapter for notebook! Thank god I have bought this awesome superthing with changable reduction, I can use the same adapter for notebook and netbook with different voltage (by the way, it shoots 120W in both and they work fine... Well, it could to be more precise)

Was the bunny okay?

It depends on if their polarity is the same.

Have you checked if the adapter plug physically fits into the netbook? If it doesn't fit then all this discussion is useless anyway.

edit: I encountered situations where the plug seemed to fit perfectly only to find that the inner connector had a slightly larger diameter resulting in intermittent connection.

It fits. :)

Wouldn't it be easier to just buy another notebook/netbook adapter? I am sure your local computer shop has them. Certainly beats experimenting with adapters that may or may not fry your stuff.

Good!
Now check for the polarity. You have 90% chances to be the same (10% is because Chinese sometimes see things differently). Look for the small sketch I mentioned earlier. If you have the old adapter (maybe you recovered something from hamster's belly) look on it for clues regarding the polarity. You have greater chances to find the polarity mentioned on the adapter but look also on the netbook (sometimes is engraved in plastic near the plug). You just have to look carefully. If there is no polarity indication you may check it with a measuring instrument if you have one (just ask if you need further assistance).
It's not rocket engineering and for a quick solution it worth the "effort".