A slightly shorter class session, as we cover three smaller topics: 1) the ideas surrounding stereoscopic photography, 2) the way 19th century photographers handled photographing standard subjects; once you take away subject, what other choices do photographers have to make? and 3) Rephotography: how does subject matter change over time and what does that mean for photographers? * Slides for this class session * Handout for this class session * The Rephotographic Survey * Bruce Myren’s 40th Parallel Project