Whilst researching cab details for my Forney project and trying to figure out what the heck the Siebert Lubricator I got from Bruce was, I came across some great offerings from google books -
Locomotive Appliances (1907) -
http://books.google.com/books?id=bLWzK4MHVfgC&printsec=frontcover&source=gbs_v2_summary_r&cad=0#v=onepage&q=&f=true
Railway and Locomotive Engineering Journal v32 (1919) (I think you can find other years/volumes too) -
http://books.google.com/books?id=EJEjAAAAMAAJ&pg=PA29&lpg=PA29&dq=railway+and+locomotive+engineering&source=bl&ots=n7OFBaVvoP&sig=pI3CA-rYlBWc0V46nldCi9Fcr9I&hl=en&ei=8O7VSqPdA4jllAfIjIidCQ&sa=X&oi=book_result&ct=result&resnum=4&ved=0CBQQ6AEwAw#v=onepage&q=&f=true
-Brian