I think they used to be on books.google.com, but here are some issues of Popular Mechanics that can be browsed: http://books.google.com/books?id=xNwDAAAAMBAJ h

I think they used to be on books.google.com, but here are some issues of Popular Mechanics that can be browsed: http://books.google.com/books?id=xNwDAAAAMBAJ http://books.google.com/books?id=xNwDAAAAMBAJ