Same Camera, Different Century: Capturing Civil War Sites, 150 Years Later : The Picture Show : NPR

Same Camera, Different Century: Capturing Civil War Sites, 150 Years Later : The Picture Show : NPR

"Believe it or not, there's a lot of food involved in wet-plate photography. Egg whites (albumen) are used to make the glass plates adhesive to the light-sensitive chemicals. And one way to keep the plates from drying out after processing is to coat them in honey. It's also physically demanding, so you get really hungry."