Dr. Marston demos kinograph, which tells blond/brunette/redhead emotions; Marston poses as 3 women are hooked up by 3 men; CU Marston describes parts of his invention; Marston speaks with brunette wrapped in cables; hooked-up women play roulette; CU brunette at table; CU needle charts emotions on drum; women laugh; man kisses brunette; CU drum shows reactions; CU wistful brunette; man fires pistol, girls jump, man laughs; CU drum; CU startled blonde; conclusion: blondes are easiest to scare...Much like a lie detector or earthquake monitor.