Arduino and App Inventor

Using Arduino Programming Questions
1

I'm using App inventor as a receiving device for my Arduino. I'm using this tutorial as a guide. My problem is I want to send multiple values to the Android phone (i.e two potentiometers).They say you will tweak the Serial.println like serial1.println and serial2.println, Does anybody know how to to this?

2

They say you will tweak the Serial.println like serial1.println and serial2.println, Does anybody know how to to this?

No, because that is NOT what you do.

How do YOU type two words, instead of one? How do YOU recognize that there are two words, instead of one?

The key is delimiters, like spaces between words.

3 
Serial.print(myFirstValue);
Serial.print(','); // comma
Serial.println(mySecondValue);

...R