Show FBI force of ef C compressed prelowe ad air th tha effects of ile air resistance roil stance rt ft well veil inn known la 1 the th twelve bud and on ono half baic mile simplon tunnel latest where a ag exceptionally ally high amount ot of energy is required for or running the electrio electr ti trains the tunnel more which la a fifteen feet wide and test feet high with a sectional urea area of two hundred and ad fifty bill square feet he has a 1 lug oll ell current r rent of 8 cubic feet of all al P per er second maintained lot a land by two lars large second blast tha tons una at tile the brig end and two exhaust inns falls at eiselle iselle trallis trains goan with this athla merent current encounter less lea t shut sl stance than in open air up to fifteen and a half miles an hour but al higher speeds or in the tha opposite diorec afir tion the resistance la Is much greaten than outside coasting by gravity done bova the seven per par toe one tio named maximum gradient a train even so go lag with the current cannot exceed thirty fil alv in milea as per hour on account per lomed ot of the 1 br g b by the air |