Petri dish be used to observe plant germination, the behavior of very small animals or for other day-to-day laboratory practices such as drying fluids in an oven and carrying or storing samples. Their transparency and flat profile also mean they are commonly used as temporary receptacles for viewing samples, especially liquids, under a low-power microscope. Petri dish A Petri dish (sometimes spelled "Petrie Dish" and alternatively known as a Petri plate or cell-culture dish), named after the German bacteriologist Julius Richard Petri, is a shallow cylindrical glass or plastic lidded dish that biologists use to culture cellssuch as bacteriaor small mosses. Modern
French butter dish French butter dish A French butter dish is a container used to maintain the freshness and spreadable consistency of butter without refrigeration. This late 19th century French-designed pottery crock has two parts: a base that holds water, and a cup to hold the packed butter which also serves as a lid. The cup containing butter is placed into the base, where water creates an airtight seal that keeps the air (and thus oxygen) away from the butter so that refrigeration is not needed, and the butter can be used in its soft form. This method will keep butter for around