I am trying to figure out the proper way to operate the bell and horn on my locomotive. My layout is a small switching layout on a shelf. I will probably have a grade crossing or two eventually, but I was more curious as to horn sequences when serving an industry as well as use of the bell. I cant seem to find the FRA regulations for the topic, and was wondering if anyone could provide some insight as to the prototypical operation of the bell and horn in the late 80's early 90'? 

Thank you,

Just what or who merged joined with the ARA in 1919?  Enquiring minds want to know:)

I know that MCB and others merged / joined with the ARA in 1919 possibly as a reaction to USRA control.

edit:  See below post of news from 1919.  The American Railway Association became the American Railroad Association at the order of the USRA

I know this so far about the ARA and AAR:

Pan Am serves a company in Peabody Ma that makes gelatin used in the pharmaceutical ibdustry. The company recieves covered hoppers of nickle sized bone chips from cows and tank cars of hydrochloric acid.
does anyone know of plant that loads bone chips in covered hoppers?
Thank you

I found this to be some very interesting information...

Signals sent to the locomotive, and an early form of stopping a train if the engineer isn't paying close attention.

My apologies if this has been shared before.