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Dilution Series

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I give you 10mls of an overnight culture of Micrococcus luteus at a concentration of 4.7 x 10^7 CFU/ml. Diagram a dilution series by using tubes containing 9ml nutrient broth (NB) and fixed-volume 1ml pipettes (won't measure any more or less than 1ml).

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We have 10 mls of 4.7x10^7 CFU/ml.

Take 1 ml of this culture using the 1ml pipette and dilute it into 9 ml of NB. That's a 1:10 dilution. The ...