CE Biology:potometer and weight potometer

This is the bubble potometer. Please be reminded that there is no need to add a layer of oil to the reserver.













This is the weight potometer. Please be reminded that we needs to add a layer of oil to the reserver to prevent the evaporation of water in the flask which will affect the accuracy of the result.















For the combination of the two potometer, we also have to add a layer of oil.