RickO posted:PJB , Thats a Mohawk in that photo you posted. This is a Niagara, to D500's point, the boiler is much "cleaner".
Direct from Wikipedia
"The Niagaras did not have steam domes, as did most steam locomotives, which resulted in a smooth contour along the top of the boiler. A perforated pipe collected steam instead. This was necessary because of the lower loading gauge of the New York Central (15 ft 2 in versus 16 ft 2 in (4.93 m) for other American railroads)."