Birches

I was out at the campus of my alma mater today, RIT, and it is a place where I never fail to find interesting subjects.  Usually it is about the architecture of the campus.  But today I was stopped short by these Birch trees planted next to one of the buildings.  They are shedding a layer of their bark at this time of year, and I had never seen this before.  Please click on the picture to see it in detail, and to see the shedding bark.  I am not sure if that means that these are a very specific type of Birch, or not.  Paper Birch comes to mind, but I will rely on you experts out there to set me straight.