Petri dish 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 Petri dishes usually feature rings and/or slots on their lids and bases so that when stacked, they are less prone to sliding off one another. Multiple dishes can also be incorporated into one plastic container to create a "multi-well plate". While glass Petri dishes may be reused after sterilization (via an autoclave at
The Old Blue Mayor She Ain't What She Used to Be tonight, flock to Marge not because she’s clearly a better candidate and person than perennially elected, womanizing, cartoonishly corrupt Diamond Joe Quimby, but because resident political operative Lindsey Naegle convinces her to use Professor Frink’s micro-targeted campaigning." "The Old Blue Mayor She Ain't What She Used to Be" scored a 1.9 rating with a 7 share and was watched by 4.75 million people, making it Fox's highest rated show of the night. The Old Blue Mayor She Ain't What She Used to Be "The Old Blue Mayor She Ain't What She Used to Be" is the sixth episode of the