Petri Dish Lid

Description (Brief):

This object is a petri dish lid with a circular paper grid featuring the numbers 1–50 taped to it. The paper grid was photocopied out of a laboratory manual, most likely one published by the Cold Spring Harbor Laboratory or Maniatis Laboratory.

Description (Brief)

The lid was used in the laboratory at Genentech, a biotechnology company, as a way to distinguish between bacterial colonies. It was placed under a clean petri dish, and bacterial colonies were transferred onto the dish, one colony per grid square. Colonies could then be tracked using their grid number. A small sample from each colony could be removed and tested to give the characteristics of the entire colony. This system was essential at Genentech where often scientists needed to keep track of 100s to 1000s of colonies per research project.

Description (Brief)


Description (Brief)

Interview with Dan Yansura, Genentech scientist, 12/20/2012

User: Genentech, Inc.

Location: Currently not on view

Used: United States: California, South San Francisco

See more items in: Medicine and Science: Biological Sciences, Biotechnology and Genetics, Science & Mathematics


Exhibition Location:

Credit Line: Gift of Genentech

Data Source: National Museum of American History

Id Number: 2012.0198.31Accession Number: 2012.0198Catalog Number: 2012.0198.31

Object Name: petri dish lid

Physical Description: plastic (overall material)paper (overall material)Measurements: overall: 5/16 in x 3 5/8 in; .79375 cm x 9.2075 cm


Record Id: nmah_1427312

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