Disappearing Act The Invisible Adjunct shuts down her popular Weblog and says goodbye to academe By SCOTT SMALLWOOD Through the blurry glass of the classroom door, a professor can be seen at the front of the room. It is a woman, but the thick window obscures any clues about how old she is or how tall or what color hair she might have. Maybe brown. She's the Invisible Adjunct. Or at least, she used to be. After five years of being an adjunct and a year after starting one of the most popular academic Weblogs, she is giving up and...