Time to Blue Your Whites

Here's another ad card out of the St. Louis Public Service bus that was retired in 1947 complete with its car cards (though many have completely fallen apart since - the bus was stored outdoors for several decades prior to acquisition by IRM). Blu-White makes clothes dazzling white! It blues and washes at the same time! Ideal for handkerchiefs, stockings, undies! I must confess I had to look up what "blueing" was when it comes to laundry; I guess it's just a way to make whites whiter.