Rule  169.  (b)  “Attend  to  lightning, warming,  ventilation,  cleaning  and supplying of cars, and to closing of car doors;  provide  for  the  comfort  and safety of passengers; see that they are directed to the proper cars, that seats are  provided,  and  that  women, children  and  infirm  persons  are assisted;  protect  them  against rudeness,  threatened  violence, abusive  or  obscene  language,  or annoyance  from  intoxicated  or quarrelsome persons.“ 

Northern Pacific Rules and Regulations effective June 1, 1899.