Full justify text?

Hi,

I noticed that the post text in some themes is full justified and I would like to do the same on the template I use.

What would I need to modify/add to my style sheet?

/*—-POST—-*/

#container{
float: left;
width: 630px;
padding: 0 0 0 0;
}

.post{
padding: 20px 50px 40px 40px;
}

.post h2{
font-family: Georgia, Sans-serif;
font-size: 22px;
padding: 20px 0 0 0;
}

.entry{
line-height: 22px;
}

.postinfo{
font-size: 12px;
color: #736E60;
padding: 2px 0 20px 0;
}

.postinfo a{
color: #736E60;
}

Thanks,
Gene