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The coolant inlet to the radiator's top tank is below the baffle on a radiator that is original or one like it. There is a cutaway drawing of the cooling system on Page 10 of the reprint of "Dyke's Automobile and Gasoline Engine Encyclopedia Supplement." Apparently, the function of the baffle is to prevent pumped coolant from splashing directly against the radiator cap and overflow tube.
Original 1928 radiators have a baffle that is on an angle, perhaps 45 degrees with its top at the back of the upper tank. Later original radiators have a horizontal baffle.