Here's a photo (from the NKP Story, photo is in the Allen County Museum) of a NKP H-6 2-8-2's backhead...
It was an improved USRA light 2-8-2 built by Lima in the '20s. The overhead lever to the top right of the boiler is the throttle.
This youtube clip has a nice view of the controls in the cab of the 4449:
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I recognize a few of the controls...to the left of the brakes is a little brass lever...the sander. The electrical controls above the window are, I believe, the headlight, mars light, and cab lights (not certain). Their is a little brass whistle in between the speedometer and the right water glass...that is a low water alarm...and I was petrified with fear of the 765's when I was little...I've never heard one, but they are LOUD! Typically, you assume that the water is in between the level of the two water glasses. 4449 has a reverse lever and power reverse just like the 765. The injector show up at 5:53 in the clip next to the fireman's seat, you can hear/watch him turn it off at 6:02...you can see it below the engineer's seat on the picture of the 765 I posted. A major difference on coal burners is that their are grates to shake on the floor...the berks have 3 shakers per side.
As a note, only oil burners have sand added to the fire daily to clean the flues.