hclark6345 posted:What is the purpose of the dog house ? Does a crewman ride back there, and if so, why ?
Some state laws (such as Ohio) required that there be a seat for every crewman. On the PRR, locomotives that had large cabs with 3 seats (like the H10s 2-8-0's) had seats for the engineer, fireman and head end brakeman. Locomotives with smaller cabs (such as L1s 2-8-2's and I1s 2-10-0's) only had 2 seats in them so the tenders needed a 'doghouse'.