Dec 05, 2013 17:39
Pet food ingredients lab. Here are fifteen substances, mostly powders. (Three are labeled DO NOT EAT. A fourth one should have been, too. Ask me how I know.)
Which one is poultry by-product meal? Can you tell it apart from chicken meal? Which is purified powdered cellulose? Which is corn starch? Which is soybean mill run? Google Images helped somewhat.
Two fine white powders were nearly indistinguishable. The one we definitively identified as cornstarch was, of course, the one that made oobleck.