Thursday morning Dr. Yampolsky came to lecture on population stability. He derived a formula that explained why populations have a carrying capacity. Lunch. Then straight to Brown to finish Wednesday's lab. We looked at the dilution series and applied some famous person's rule of distribution to our results. Then we looked at our petri dishes we contaminated with our fingers. We learned that not all ger-x kills bacteria. My sample was gross looking. Then Emily and I went to Dr. yampolsky's lab to spread E. Coli on the petri dishes we had prepared. Then we put the slime mould on them so it will grow over the weekend and be ready for us to examine on Monday. soccer. shower. Went to eat at Cheddars. Emily and I went to the CPA for a few minutes, then bed.