More cool Chem-trail pics I took in New England

What struck me as odd about the trail on the right is the way it gets narrow at the very end (farthest away). I don’t know what would cause this because one would expect the plane's exhaust contrail to disperse in a relatively even manner. That thing just narrows to a point.

However, it is not the result of the plane being at that point when I took the photo because I was starring at these things in the sky for a long time and if the plane had just gone over, the rest of the contrail would not have dispersed so much.

[link to i1094.photobucket.com]

[link to i1094.photobucket.com]