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 Circular Staircase Selig from using the title. "The Bat" led to several adaptations of its own. In 1926 Rinehart licensed a novelization of "The Bat", published under her name but ghostwritten by Stephen Vincent Benét, partly to distance "The Bat" from "The Circular Staircase". It was filmed three times: as the 1926 silent film "The Bat", as the 1930 talking film "The Bat Whispers", and as the 1959 horror picture "The Bat". The Circular Staircase The Circular Staircase is a mystery novel by American writer Mary Roberts Rinehart. The story follows dowager Rachel Innes as she thwarts a series of strange crimes