If you like, you can measure the daily growth of the bacteria colonies by using a felt-tip marker to trace a circle around each colony on the bottom of the petri dish. After several days, you should have a collection of concentric rings on the bottom of each dish.
Alfred Adler was a physician, psychotherapist, and the founder of Adlerian psychology, sometimes called individual psychology. He is considered the first community psychologist, because his work pioneered attention to community life, prevention, and population health.
Lou Adler (lou@adlerconcepts.com) is the president of The Adler Group (www.adlerconcepts.com), an international training and consulting firm helping companies implement Performance-based Hiring. He is the Amazon best-seller author of Hire With Your Head (John Wiley & Sons, 3rd Edition, 2007), the Nightingale-Conant audio program Talent Rules!