(Image credit: Ann Rosener, Office of War Information, via Shorpy)

Posted by Ellen

In 1942 in the Melrose Park Buick plant outside Chicago, "vital cogs in America's war machine"--that's Office of War Information talk for airplane-engine gears--are being inspected for defects. Dorothy Miller, at left, checks a vital cog with aid of a tiny flashlight in her right hand. Sylvia Dreiser, at right, thinks about whatever it is she's thinking about, which may not be cogs at all. I'd rather ride in an airplane powered by Dorothy's cogs.

If you click on this photo to get the large version and look at it closely, you may be able to see that both women's hands are slathered in oil. In fact, you have to wonder how many times a day did that penlight squirt right out of Dorothy's slippery fingers. Also, for what it's worth, Dorothy is wearing a hairnet and Sylvia isn't.