If you study Slow Cinema, or time in film in more general terms, you cannot avoid reading Mary Ann Doane's The Emergence of Cinematic Time (2004). It is a kind of bible for those who are interested in how cinema came about, although I do find it, in fact, too little concerned with cinema itself, and more with everything that came before. I haven't managed to read the whole book yet, though, but I'm definitely missing something there.
In any case, Doane made reference to something that I had come about when I started reading . . .