Charles Bargue contributed to the French drawing schools with a book of plates for students to copy and learn the principles of measurement and sight seeing as a fundamental skill.
I am sorry for the horribly bad lighting and photo. It's a bad combo of cell phone camera with 1 light in the entire room kinda thing.
http://conceptart.org/forums/showthread.php?166289-Charles-Bargue-Drawings-Prints-to-download
there is a conceptart.org thread with links (hopefully still working) to some of the plates.
Link
Triple-Shot
I'm not entirely sure why I like this so much, but I do. So have a +Fav haha.