| Here is page 21 of a 96-page monograph entitled "Power To Burn: Smoke, Steam, & Cinders" that was edited by James M. Shafer and published during 1976. Photo Caption: "A PRR Class P-5, electric, is shown hauling a passenger train just as it emerged from the Bergen, N.J., portal of the tunnel under the Hudson River." Note the two sources of electric current: overhead catenary and track-level third rail; the latter is used by the PRR's DD-1 electric locomotives. |